Historical Identification: Per Dreyer, NGC 5550 (= GC 3840 = JH 1774, 1860 RA 14 11 44, NPD 76 27.9) is "very faint, considerably small, pretty much extended." The position precesses to RA 14 18 29.9, Dec +12 53 13, just off the northeastern rim of the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Physical Information: Based on a recessional velocity of 7425 km/sec, a straightforward calculation indicates that NGC 5550 is about 345 million light years away, in fair agreement with redshift-independent distance estimates of 360 to 405 million light years. However, for objects at such distances we should take into account the expansion of the Universe during the time it took their light to reach us. Doing that shows that the galaxy was about 335 million light years away at the time the light by which we see it was emitted, about 340 million years ago (the difference between the two numbers being due to the expansion of the intervening space during the light-travel time). Given that and its apparent size of about 1.1 by 0.75 arcmin, the galaxy is about 105 to 110 thousand light years across.

Historical Identification: Per Dreyer, NGC 5551 (=GC 5764, Marth #276, 1860 RA 14 11 53, NPD 83 55) is "3 stars in nebulosity." The position precesses to RA 14 18 52.8, Dec +05 26 09, just over an arcmin southwest of the galaxy listed above, the description fits and there is nothing comparable nearby, so the identification is certain.
Physical Information: Based on a recessional velocity of 7500 km/sec, a straightforward calculation indicates that NGC 5551 is about 350 million light years away. However, for objects at such distances we should take into account the expansion of the Universe during the time it took their light to reach us. Doing that shows that the galaxy was about 340 million light years away at the time the light by which we see it was emitted, nearly 345 million years ago (the difference between the two numbers being due to the expansion of the intervening space during the light-travel time). Given that and its apparent size of about 0.55 by 0.5 arcmin, the galaxy is about 55 thousand light years across.

Historical Identification: Per Dreyer, NGC 5552 (= GC 5765, Marth #277, 1860 RA 14 12 12, NPD 82 19) is "very faint, small." The position precesses to RA 14 19 08.8, Dec +07 02 11, about 1.2 arcmin east northeast of the galaxy listed above, the description fits and the only nearby object is accounted for by NGC 5554, discovered by Marth on the same night, so the identification is certain. (See NGC 5558 for a discussion of the duplicate entry.)
Physical Information: Based on a recessional velocity of 7585 km/sec, a straightforward calculation indicates that NGC 5552 is about 350 to 355 million light years away. However, for objects at such distances we should take into account the expansion of the Universe during the time it took their light to reach us. Doing that shows that the galaxy was about 340 to 345 million light years away at the time the light by which we see it was emitted, about 345 to 350 million years ago (the difference between the two numbers being due to the expansion of the intervening space during the light-travel time). Given that and its apparent size of about 0.8 by 0.3 arcmin, the galaxy is about 80 thousand light years across.

Historical Identification: Per Dreyer, NGC 5553 (= GC 3841 = JH 1775, 1860 RA 14 12 13, NPD 63 04.8) is "very faint, small, a little extended."
Physical Information: Apparent size 1.2 by 0.3 arcmin.

Historical Identification: Per Dreyer, NGC 5554 (= GC 5766, Marth #278, 1860 RA 14 12 19, NPD 82 19) is "extremely faint, small." (See NGC 5564 for a discussion of the duplicate entry.)
Physical Information: Apparent size 0.7 by 0.5? arcmin

Historical Identification: Per Dreyer, NGC 5555 (Ormond Stone list I (#202), 1860 RA 14 12 20, NPD 108 28.6) is "very faint, small, irregularly round, gradually brighter middle and nucleus."
Designation Note: Gottlieb notes that although this is MCG -03-36-011, the MCG does not list it as NGC 5555.
Physical Information: Apparent size of about 0.7 by 0.45 arcmin (from images below)

Historical Identification: Per Dreyer, NGC 5556 (= GC 3842 = JH 3564, 1860 RA 14 12 25, NPD 118 36.2) is "extremely faint, large, small (faint) star involved."
Physical Information: Apparent size 4.4 by 3.2 arcmin (from CIGS image)

Historical Identification: Per Dreyer, NGC 5557 (= GC 3843 = JH 1776 = WH I 99, 1860 RA 14 12 34, NPD 52 51.6) is "considerably bright, small, round, very suddenly brighter middle like a star."
Discovery Note: Gottlieb writes that this object was observed at Birr Castle 11 times (on the date above, by either the 3rd Lord Rosse or his assistant, William Rambaut), and sometimes "overzealously described" as having spiral features; but that in the 3rd Lord Rosse's 1850 paper it is a standard E-type galaxy (which it is), and his 1861 publication states "frequently observed, nothing certain."
Physical Information: Apparent size 2.4 by 1.9 arcmin (? disagrees with listed ellipticity ?)

Historical Identification: Per Dreyer, NGC 5558 (Swift list I (#32), 1860 RA 14 12 46, NPD 82 19.0) is "extremely faint, small, a little extended, north-preceding (northwestern) of 2," the other being NGC 5564. The position precesses to RA 14 19 42.8, Dec +07 02 15, in an essentially empty region, but about halfway between a galaxy 30 seconds of time to the east and a pair of galaxies about 30 seconds of time to the west. Since Swift described this as being one of two nebulae, the pair to the west seems most likely, and as stated in the Discovery Note below, the star lying between the galaxies in that pair makes the identification of the western galaxy as NGC 5558 and the eastern one as NGC 5564 absolutely certain. But since Marth had already discovered and correctly recorded the positions of those galaxies as NGC 5552 and 5554, Swift's observations simply resulted in duplicate NGC entries.
Discovery Note: In his notes for NGC 5552 (partially repeated in his notes for NGC 5558) Gottlieb writes that Marth found NGC 5552 and 5544 on May 8, 1864, and recorded good positions for them. He then adds that "Swift may have found this pair again on 14 Jun 1884", recording his list I #32 (= NGC 5558) as "small, very very faint, a little extended; 2 faint stars point to it; 2 other near; very diffuse; north-preceding of 2 (with his I #33 = NGC 5564)." Unfortunately, Swift's RA was 38 seconds too large, and 32 seconds less than that of NGC 5563, leading Dreyer to suggest that both Swift I #33 and I #34 referred to NGC 5563. Gottlieb finishes by stating that Corwin notes that Swift's description of his discoveries (which became NGC 5558 and 5564) are a much better fit with NGC 5552 and 5554, in which case (as shown in the title for this entry) NGC 5558 = NGC 5552.
Physical Information: Given the duplicate entry, see NGC 5552 for anything else.

Historical Identification: Per Dreyer, NGC 5559 (= GC 3844 = JH 1777 = WH III 347, 1860 RA 14 12 51, NPD 64 32.7) is "very faint, small, very little extended, brighter middle." The position precesses to RA 14 19 12.2, Dec +24 48 32, only 0.6 arcmin north of the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Discovery Note: Per Gottlieb, William Herschel's position was 77 seconds of time to the west of this object, but when John Herschel made his essentially accurate observation of this object and its environs he realized that his #1777 must be the same as his father's III 347, so the correct identification of III 347 as the galaxy listed above is nearly two centuries old.
NGC Note: A Note at the end of the NGC quotes John Herschel: "(JH) 1777 = (WH) III 347. Auwers makes ΔP.D. (the difference in polar distances) = -59', but observes that there must be some misprint. I find that 1° has been mistaken (see errata, G.C. p. 45), and the identity is therefore proved.
Physical Information: Based on a recessional velocity of 5165 km/sec (and H₀ = 70 km/sec/Mpc), NGC 5559 is about 240 million light years away, in good agreement with redshift-independent distance estimates of about 200 to 245 million light years (the page describing the HST image below gives the distance as 240 million light years). Given that and its apparent size of about 1.5 by 0.35 arcmin (from the images below), it is about 105 thousand light years across.
A Note About The HST Image: Although in most ways NGC 5559 is a typical spiral galaxy, a calcium-rich supernova was observed in its disk in 2001. Calcium-rich supernovae are relatively faint and fade very quickly, and their spectra show exceptionally strong emission lines due to calcium atoms. What kind of stars produce such supernovae and why they occur is a mystery. For one thing, they are typically observed in galaxy halos, where very old stars predominate, while other supernovae usually occur within star-forming regions filled with very young stars. As of August 2017 only 15 calcium-rich supernovae had been identified, and between their rarity and unusual characteristics there is great interest in learning more about the stars that become such supernovae. It is for this reason that the HST Picture of the Week for Sep 4, 2017 was the one shown below.

Historical Identification: Per Dreyer, NGC 5560 (= GC 3845 = JH 1778 = WH II 579, 1860 RA 14 13 02, NPD 85 21.8) is "pretty faint, considerably large, extended, gradually brighter middle." The position precesses to RA 14 20 04.4, Dec +03 59 29, almost dead center on the galaxy listed above, the description fits and the only other galaxies in the region are accounted for by NGC 5566 and 5569, so the identification is certain.
PGC 51269: Corwin notes that Dreyer sketched what became CGCG 047-019 (= PGC 51269) on April 16, 1878, while examining the NGC 5560/5566/5569 triplet (= Arp 286), but did not estimate its position accurately enough to include it in the NGC. (Corwin gives credit to Yann Pothier for having noticed Dreyer's observation in Lord Rosse's 1880 paper.) Since it is too far in both apparent and actual distance from the triplet to consider it to be any kind of companion, it has no place on this page; but it is a so-called "notngc" object (meaning a galaxy discovered before the NGC was published, but which never made it into any of Dreyer's works), and deserves some recognition, so it is discussed at the location linked by the title of this paragraph.
The NGC 5566 Group: The three galaxies comprising Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577. The entire group is shown in the 1-degree wide SDSS image of NGC 5566.
Physical Information: With NGC 5566 and 5569, NGC 5560 completes Arp 286, a trio of galaxies used by the Arp Atlas as an example of infall and attraction, each of which has features suggestive of gravitational interaction between the galaxies. Based on a recessional velocity of 1730 km/sec (and H₀ = 70 km/sec/Mpc), NGC 5560 is about 80 million light years away, in reasonable agreement with redshift-independent distance estimates of about 40 to 80 million light years. Since it appears to be gravitationally interacting with its neighbors (see the GALEX image of the trio at the entry for NGC 5566), they should be at about the same distance. A comparison of the redshift-based and redshift-independent distance estimates for the galaxies suggests a common distance of about 70 million light years. If that is correct, NGC 5560's apparent size of about 4.0 by 1.3 arcmin (from the images below) would make it about 80 to 85 thousand light years across.

Historical Identification: Per Dreyer, NGC 5561 (Swift list I (#31), 1860 RA 14 13 04, NPD 30 36.2) is "extremely faint, pretty small, round, faint star close preceding (to west)." PGC 51026 is sometimes misidentified as NGC 5561.
Historical Misidentification: Gottlieb writes that although Swift's position and description were good, PGC, MCG and RC3 all misidentified UGC 9151 as NGC 5561 (although HyperLEDA has corrected the PGC misidentification). The following entry discusses that misidentification.
Physical Information: Apparent size 0.45 by 0.3 arcmin. Recessional velocity 11890 km/sec; relativistic distance 530 million light years when light we now see was emitted, 540 million years ago.
LEDA Sb; NED Sb, .52 x .41 arcmin, 3K Vr 12009 km/sec, z .0400582185 (533.6 Gly, 544 Gyr)

Historical Misidentification: As noted in the entry for NGC 5561, several references misidentified UGC 9151 as that NGC object. The galaxy listed above does look much more impressive than Swift's object in the images shown on this page, but it has far too low a surface brightness for him to have noticed it. Photographic images of galaxies can show low-surface brightness objects quite clearly, but the visual observers of the 18th and 19th centuries could only see the bright central regions of galaxies; so although PGC 51026 looks just as impressive than the actual NGC 5561 in the photographs shown here, it would have been completely invisible to Swift and his contemporaries.
Physical Information: Apparent size 1.0 by 0.5? arcmin.
LEDA SABm, B 15.99, I 15.30 -> V 15.5(?); NED Sm, 1.1 x .4 arcmin, 3K Vr 3162 km/sec

Physical Information:
LEDA Sc, B 17.21, I 16.43 -> V 17(?); NED 17.0g, 3K Vr 12172 km/sec, z 0.040602559 (540.5 Gly, 551 Gyr)

Historical Identification: Per Dreyer, NGC 5562 (Tempel list VIII, 1860 RA 14 13 15, NPD 79 22) is "very faint, small, very faint star 3 seconds of time following (to east)." The position precesses to RA 14 20 06.2, Dec +09 59 18, but there is nothing there. However, the galaxy listed above lies almost directly north of the position, and perfectly fits Tempel's description of the region ("3' south-preceding the nebula is a star 11m, and 3 sec following is a very faint star"), as there is a magnitude 11.7 star southwest of the galaxy and a magnitude 14.3 star 3.7 seconds of time east southeast of it; and as there is nothing else in the region, the identification is certain despite the 16 arcmin error in Tempel's declination.
Discovery Notes: Although the object is described in Tempel's paper, it is not in the ordered list provided at the start of the paper, but in the extensive notes following that list. Steinicke's translation of that (German) description is the source for the quote in the Historical Identification.
Physical Information: Apparent size of about 0.75 by 0.75 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 5563 (= GC 5767, Marth #279, 1860 RA 14 13 16, NPD 82 17) is "extremely faint, small, a little extended."
Discovery Note: Gottlieb writes "Lewis Swift's position for Swift I #33 = NGC 5564 is just 2' south of this galaxy, but his description applies to NGC 5554." (See notes for NGC 5564.)
Physical Information: Apparent size 0.7 by 0.4? arcmin

Historical Identification: Per Dreyer, NGC 5564 (Swift list I (#33), 1860 RA 14 13 17, NPD 82 20.0) is "extremely faint, small, probably = Marth #279." It is indeed a duplicate observation, but of Marth 278 = NGC 5554, not Marth 279 = NGC 5563.
Identification Note: As noted in the entry for NGC 5558, Swift's positions for his I #32, #33 and #34 were poor, and led Dreyer to suppose that I #33 and #34 were observations of NGC 5563 (in fact, Gottlieb writes that Swift's position for I #33 lies only 2' south of NGC 5563, which would seem to confirm Dreyer's suspicion). However, as noted by Corwin, Swift's description "Small; very very faint; south-following of 2; very diffuse; a star midway between them" does not fit Dreyer's assumption; and since there is a notable (mag 13) star nearly midway between NGC 5552 and 5554, NGC 5558 must be a duplicate observation of NGC 5552, and NGC 5564 must be a duplicate observation of NGC 5554, as noted in the title for this entry.
Physical Information: Given the duplicate entry, see NGC 5554 for anything else.

Historical Identification: Per Dreyer, NGC 5565 (Swift list I (#34), 1860 RA 14 13 17, NPD 82 20.5) is "extremely faint, small, very difficult, probably = Marth #279", Marth 279 being NGC 5563. If this were a Marth object, it would undoubtedly be connected with Marth 278, as in the case of NGC 5564; but instead, it is almost certainly the star listed above. Steinicke agrees that it is that star (though he also lists it as "NGC 5563?"); but although Corwin also identifies NGC 5565 as that star, he feels uncertain about the identification.
Identification Note: As also noted by Corwin, Gottlieb points out that Swift I #34 ("Small; very very faint; round; very difficult" has a position 30 arcsec south of Swift I #33 (= NGC 5564), which is now thought to be a duplicate observation of NGC 5554, in which case NGC 5565 almost has to be the star 1.8 arcmiin southeast of NGC 5554. Gottlieb concludes by stating that no matter what object is what NGC object, there are only three galaxies in the area, and all were previously found by Marth, so Swift's observations are all duplicate observations or (in this case) not a galaxy at all.
About The PGC Designation: As is true for almost all NGC/IC objects, HyperLEDA assigned a PGC designation to this object, even though it is only a star; but as is also true for most such assignments, a search for that designation returns no result, so it is shown in quotes.

Historical Identification: Per Dreyer, NGC 5566 (= GC 3846 = JH 1779 = WH I 144, 1860 RA 14 13 18, NPD 85 24.3) is "bright, pretty large, round, pretty suddenly brighter middle, mottled but not resolved, 12th magnitude star 1.5 arcmin following (to east)." The position precesses to RA 14 20 20.4, Dec +03 57 01, about 0.9 arcmin north of the center of the galaxy listed above, between its nucleus and the outline of its disk, the description is a perfect fit, and the only other galaxies in the region are accounted for by NGC 5560 and 5569, so the identification is certain.
NGC Note: A Note at the end of the NGC quotes John Herschel: "(JH) 1779 = (WH) I 144. Auwers makes (WH) - (JH) = 1&176; 14' in P.D. The cause of the discordance is a misprint in (the) P.T. (Philosophical Transactions)."
The NGC 5566 Group: As shown in the 1-degree wide SDSS image below, the three galaxies that comprise Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577.
Physical Information: With NGC 5560 and 5569, NGC 5566 completes Arp 286, a trio of galaxies used by the Arp Atlas as an example of infall and attraction, each of which has features suggestive of gravitational interaction between the galaxies. Based on a recessional velocity of 1505 km/sec (and H₀ = 70 km/sec/Mpc), NGC 5566 is about 70 million light years away, in good agreement with redshift-independent distance estimates of 65 to 85 million light years. Since it appears to be gravitationally interacting with its neighbors (see the GALEX image of the trio below), they should be at about the same distance. A comparison of the redshift-based and redshift-independent distance estimates for the galaxies suggests a common distance of about 70 million light years. If that is correct, NGC 5566's apparent size of about 6.6 by 2.2?? arcmin (from the images below) should make it about 135?? thousand light years across.

Below, an ultraviolet image of the galaxies in Arp 286 shows where hot, bright young stars have recently formed within them. The central bar of NGC 5566 does not show up in this image because it consists of older, cooler stars; but the ring of stars around the nucleus and the extensive star formation in the arms are obvious, as is the distortion of NGC 5560 due to its gravitational interaction with the larger galaxy. There is similar evidence of accelerated star formation throughout NGC 5569, so despite a much greater uncertainty in its distance, it is probably a physical part of Arp 286. (Image credit NASA, JPL-Caltech, GALEX)

Historical Identification: Per Dreyer, NGC 5567 (= GC 3847 = JH 1780, 1860 RA 14 13 21, NPD 54 13.9) is "pretty faint, round."
Physical Information: Apparent size 1.1 by 0.9? arcmin

Historical Identification: Per Dreyer, NGC 5568 (Bigourdan (list II #72), 1860 RA 14 13 22, NPD 54 16) is "very faint, small, very diffuse.".
Physical Information: Apparent size 0.8 by 0.6? arcmin

Historical Identification: Per Dreyer, NGC 5569 (= GC 3848, 3rd Lord Rosse, 1860 RA 14 13 30, NPD 85 24) is "extremely faint, pretty large, round." The position precesses to RA 14 20 32.4, Dec +03 57 20, about 1.7 arcmin south of the galaxy listed above,
Discovery Notes: Although Dreyer credits the discovery to William Parsons, 3rd Earl of Rosse, he notes that many of Rosse's nebular discoveries were actually made by one of his assistants, in this case George Stoney.
The NGC 5566 Group: The three galaxies comprising Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577. The entire group is shown in the 1-degree wide SDSS image of NGC 5566.
Physical Information: With NGC 5560 and 5566, comprises Arp 286, a trio of gravitationally interacting galaxies used as an example of infall and attraction, each of which has features suggestive of gravitational interaction between the galaxies. Based on a recessional velocity of 1780 km/sec (and H₀ = 70 km/sec/Mpc), NGC 5569 is about 83 million light years away, in poor agreement with a redshift-independent distance estimate of 55 million light years. Still, the two values bracket the approximate distance of its "companions", and since it appears to be gravitationally interacting with its neighbors (see the GALEX image of the trio at the entry for NGC 5566), they should be at about the same distance. A comparison of the redshift-based and redshift-independent distance estimates for the galaxies suggests a common distance of about 70 million light years. If that is correct, its apparent size of 1.7 by 1.5?? arcmin (from the images below) should make about 35 thousand light years across.

Historical Identification: Per Dreyer, NGC 5570 (= GC 3849 = JH 1781 = WH III 12, 1860 RA 14 13 32, NPD 81 50.4) is "faint, small, irregularly round." The position precesses to RA 14 20 27.8, Dec +07 30 56, but there is nothing there, nor anywhere near there. However, Corwin writes that the galaxy listed above, which lies 6 minutes of time to the west of the position, fits WH's original description ("very faint forming an arch with 3 stars"), and that the error of 6 minutes of time in the right ascension is probably a misprint (Herschel's first list of 1000 new nebulae and clusters placed the nebula 21m 15s west of 31 Bootis, and if the 21 was supposed to be 27, that would take care of the problem). Gottlieb's note (discussed below) lends further support to the idea that NGC 5570 is simply a misrecorded observation of NGC 5519, and the identification of NGC 5570 as a duplicate entry for NGC 5519 is now considered to be essentially certain.
Identification of WH's Nebula: Gottlieb notes that WH apparently made a second observation of this object on May 12, 1793, writing "2 very small (faint) stars with nebulosity suspected between them", and placing the nebula 1m 53s preceding (to the west of) and 1° 24' north of what is now called HD 124929, "considerably closer to NGC 5519." Gottlieb concludes with "He apparently did not include this in his lists of nebulae because he 'suspected' the nebulosity."
Misidentification as WH III 12: (To be updated SOON) What WH saw was almost certainly what became NGC 5519, hence the "current" identification of NGC 5570 as a duplicate observation of NGC 5519; but the position for 5570 is based on WH's incorrect position for (almost certainly) what became NGC 5519 and JH's presumably more or less accurate position for what he thought was what his father had observed. And since what, if anything, JH observed was not what his father observed, NGC 5570 probably should not be equated with WH III 12 or NGC 5519, but with whatever JH observed. Still, it would not pay to make this any more of a mess than it has to be, so this entry will be substantially revised in the relatively near future, almost certainly by disavowing WH's observation, and (if possible) making suggestions for what JH 1781 might have been (and refuting existing misidentifications of even that observation).
Identification With JH's Nebula: John Herschel equated his father's III 12 with his own #1781, making both observations the basis for GC 3849. However, given the large error in the earlier observation, what JH observed was almost certainly something else (Gottlieb notes that the RNGC and PCG misidentified CGCG 047-007 as NGC 5570 (though HyperLEDA has corrected that error): "This galaxy is roughly 1 min of RA west of WH's position and 5' south, but doesn't match description... Still, it's possible (that) CGCG 047-007 = (JH) 1781.").
Physical Information: Apparent size 1.6 by 1.0? arcmin; Given the duplicate entry, see NGC 5519 for anything else.

Historical Misidentification: As noted in the entry for NGC 5570, John Herschel equated his #1781 with his father's III 12. Given the large error in WH's position, that cannot be correct, so whatever JH observed is not NGC 5570, despite Dreyer's description for that nebula following the erroneous conclusion in the GC. However, the galaxy misidentified by the RNGC (and the original PGC) as NGC 5570 may well be what John Herschel observed, so this entry discusses that object.
Misidentification Note: Gottlieb suggests that perhaps this erroneous identification of NGC 5570 is what John Herschel observed, since he obviously did not observe his father's III 12, and this galaxy is only 1 minute of time to the west and 5 arcmin south of the GC (and NGC) position for JH 1781. However, as discussed in the next paragraph, I think that must be wrong, and that what JH observed was probably the magnitude 11.8 star slightly to the east of his position.
John Herschel's JH 1781: John Herschel's 1833 Slough Catalogue lists his #1781 (presumed by him to be WH III 12) as "Not very faint; small; round; brighter middle," with a position of 1830 RA 14 12 14±, NPD 81 42±. This precesses to 1860 RA 14 13 43±, NPD 81 50±. JH's 1864 General Catalogue changed the description of what was now also listed as GC 3849 to "faint; small; irregularly round" and the position to RA 14 13 31.7, NPD 81 50 21.0, which is how Dreyer obtained his entry for NGC 5570. As described in the entry for NGC 5570, that object (the probable WH III 12) lies 6 minutes of time to the west, so JH 1781 cannot be NGC 5570; however, although Gottlieb supposes that PGC 51185 might be JH 1781, I cannot believe that. Such an extremely faint galaxy could not have been described by JH as either "not very faint" or "faint", but if seen by either Herschel would have been described as "extremely faint", and it is extremely unlikely that either Herschel could have seen it at all, as it is neither bright, nor does any part of it have a surface brightness detectable by visual observers of that time.
LEDA SBc, B 15.64, I 15.05 -> V 15.35 = 15.5(?); NED spiral, 15.8g, .53 x .38 arcmin, 3K Vr 7533 km/sec, z 0.0251279 (340.6 Gly, 345 Gyr)

Historical Identification: Per Dreyer, NGC 5571 (Bigourdan (list II #73), 1860 RA 14 13 37, NPD 54 12) is "a small cluster of faint stars in nebulosity." The position precesses to RA 14 19 32.5, Dec +35 09 18, on the northeastern outline of the four stars listed above, and although there is no nebulosity, that often occurs in such historical descriptions, and there is nothing else nearby that fits the description, so the identification is certain.
Identification Note: Corwin writes that although Bigourdan's first observation mentions some nebulosity, his second one does not; so there is no problem with his description. The only problem (as also noted by Corwin) is that the RNGC mistakenly assigned Bigourdan's observation to NGC 5579, a galaxy a minute of time to the east and a little to the north of Bigourdan's position, thereby also mistakenly equating NGC 5571 with NGC 5579.
About The PGC Designation: As in the case of most NGC/IC objects, HyperLEDA assigned a PGC designation to this object, even though it isn't a galaxy. However, a search of the database for that designation returns no result, so it is shown in quotes.
Physical Information: The southwestern star is magnitude 15.8, the northern one is magnitude 15.1, and the southeastern pair are magnitudes 15.2 (on the northeast) and 15.3 (on the southwest).

Historical Identification: Per Dreyer, NGC 5572 (Stephan list XIII (#73), 1860 RA 14 13 44, NPD 53 12.8) is "extremely faint, very small, brighter middle."
Discovery Note: The published date for Stephan's discovery is much later; but a study of his original papers shows that he first observed this object on the date shown above, and the later date was when he published a micrometrically measured position.
Physical Information:
NED Sb, 14.6g, .84 x .79 arcmin, 3K Vr 7613 km/sec, z 0.025394412587 (344.1 Gly, 348 Gyr)

Historical Identification: Per Dreyer, NGC 5573 (= GC 5768, Marth #280, 1860 RA 14 13 46, NPD 82 27) is "very faint, small, a little extended."
Physical Information: Apparent size 1.3 by 0.2? arcmin

Historical Identification: Per Dreyer, NGC 5574 (= GC 3850 = JH 1782 = WH I 145, 1860 RA 14 13 53, NPD 86 07.2) is "pretty faint, pretty small, a little extended, preceding (western) of 2," the other being NGC 5576.
The NGC 5566 Group: The three galaxies comprising Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577. The entire group is shown in the 1-degree wide SDSS image of NGC 5566.
Physical Information: Apparent size 1.5 by 1.1 arcmin.

Historical Identification: Per Dreyer, NGC 5575 (= GC 5769, Marth #281, 1860 RA 14 14 00, NPD 83 08) is "faint, very small, or nebulous star."
Discovery Note: Herschel never published his observation because the nebulosity he thought he detected at low power disappeared at higher power; but his position lies within an arcmin of the galaxy, so there is no doubt that he observed the object on the date shown above; still, because of the lack of publication, Marth does deserve credit for the first published mention of its existence. (See NGC 5578 for a discussion of Swift's duplicate "discovery".)
Physical Information: Apparent size 1.0 by 0.9? arcmin

Historical Identification: Per Dreyer, NGC 5576 (= GC 3851 = JH 1783 = WH I 146, 1860 RA 14 14 01, NPD 86 05.1) is "bright, small, round, very suddenly much brighter middle, following (eastern) of 2," the other being NGC 5574.
The NGC 5566 Group: The three galaxies comprising Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577. The entire group is shown in the 1-degree wide SDSS image of NGC 5566.
Physical Information: Apparent size 3.8 by 2.7 arcmin

Historical Identification: Per Dreyer, NGC 5577 (= GC 3855, 3rd Lord Rosse, d'Arrest, 1860 RA 14 14 09, NPD 85 54.9) is "pretty faint, pretty large, very much extended 53°."
Discovery Notes: Although Dreyer credits the discovery to William Parsons, 3rd Earl of Rosse, he notes that many of Rosse's nebular discoveries were actually made by one of his assistants, in this case George Stoney. d'Arrest's observation is of particular note because Stoney put this "large, faint ray" about 16 arcmin northeast of NGC 5576, but as noted by d'Arrest, it is only 10 arcmin distant; so although Stoney was the first observer to see the galaxy, its NGC position came from d'Arrest's observation.
The NGC 5566 Group: The three galaxies comprising Arp 286 represent half of the so-called NGC 5566 Group, which also includes NGC 5574, 5576 and 5577. The entire group is shown in the 1-degree wide SDSS image of NGC 5566.
Physical Information: Apparent size 3.2 by 0.9? arcmin

Historical Identification: Per Dreyer, NGC 5578 (Swift list I (#35), 1860 RA 14 14 16, NPD 83 09.0) is "very faint, very small, a little extended, much brighter middle and nucleus." The position precesses to RA 14 21 14.2, Dec +06 12 26, just under 15 seconds of time due east of the galaxy listed above, the description is reasonable and there is nothing else nearby, so the identification of NGC 5578 as a duplicate observation of NGC 5575 is certain. The only thing not certain is why, knowing that Swift's right ascensions were often poor, Dreyer didn't realize that this might be the same object that Marth had observed twenty years earlier.
Physical Information: Given the duplicate entry, see NGC 5575 for anything else.

Historical Identification: Per Dreyer, NGC 5579 (= GC 3852 = JH 1784 = WH III 415, 1860 RA 14 14 32, NPD 54 09.8) is "very faint, considerably large, preceding (western) of 2," the other being NGC 5580.
Discovery Note: John Herschel claimed (in the GC, and Dreyer repeated his claim in the NGC) that this object was never observed at Birr Castle. However, Gottlieb notes that Lord Rosse's assistant, Samuel Hunter, observed this galaxy and NGC 5589 and 5590 on the date shown above, describing it as "a pretty large, faint nebula, very gradually brighter middle, with a triangle formed by 3 stars." The problem is that his observation wasn't published until 1880, so Herschel had no way of knowing about it when he published the GC in 1864, and in Lord Rosse's 1880 publication it was mistakenly listed in the entry for GC 3876 (the future NGC 5533), so Dreyer also had no way of realizing that Hunter had observed NGC 5579.
Conflation With NGC 5571: As noted by Corwin, the RNGC mistakenly assigned Bigourdan's observation of the group of stars that became NGC 5571 to NGC 5579, thereby creating the illusory claim that NGC 5571 = NGC 5579. That is why the title of this entry denies that mistaken identification.
Physical Information: Based on a recessional velocity of 3600 km/sec, NGC 5579 is about 165 million light years away, considerably further than redshift-independent distance estimates of 110 to 115 million light years. However, the general consensus seems to be that the larger distance is correct, and the redshift-independent estimates are based on less than ideal methods. Assuming the larger distance is correct, its apparent size of 1.75 by 1.15 arcmin suggests that it is about 85 thousand light years across. It is probably physically interacting with PGC 214249, with which it comprises Arp 69.
Use By The Arp Atlas: NGC 5579 is used by The Arp Atlas of Peculiar Galaxies as an example of a spiral galaxy (NGC 5579) with a small high surface brightness companion (PGC 214249, misidentified in the Arp Atlas as NGC 5580 (which see) because of an error in the RNGC), with the note "three-armed spiral."

Physical Information: The 3645 km/sec recessional velocity of PGC 214249 is essentially the same as that of NGC 5579 (which see for images), with which it forms Arp 69 (although it is misidentified in the Arp Atlas as NGC 5580); and odds are that they are at the same distance (of about 165 million light years), and a physically interacting pair. Given that, its apparent size of 0.35 by 0.15 arcmin corresponds to a physical size of about 15 thousand light years.

Reason For This Entry: Gottlieb's description of his visual observations of NGC 5579 includes a mention of the "fairly faint" small galaxy with a "very small brighter nucleus" 3 arcmin north-northwest of the NGC object; hence my placing this entry here.
Physical Information: Given its very large recessional velocity, PGC 2061435 is not a companion of NGC 5579, but only a very distant background galaxy.
LEDA Sbc, B 16.5, I 15.3; V from Gottlieb; NED 16.4g, .37 x .33 arcmin, 3K Vr 19200 km/sec, z .064044 (829.7 Gly, 856 Gyr)

Historical Identification: Per Dreyer, NGC 5580 (= GC 3853 = JH 1785, 1860 RA 14 14 45, NPD 54 08.9) is "pretty bright, small, following (eastern) of 2," the other being NGC 5579.
Historical Misidentification: Gottlieb writes that John Herschel observed NGC 5579 and JH 1785 on Apr 27, 1827, but that although his position for NGC 5579 was good, there is nothing at his position for JH 1785. However, NGC 5590 lies exactly 1 minute of time to the east of Herschel's position, so Corwin wrote (in a personal letter to Gottlieb dated Sep 12, 1994) that NGC 5580 must be a misrecorded observation of NGC 5590. Gottlieb then says see Corwin's notes for the full story, which means that this paragraph may be replaced by Corwin's notes (which are the next item on the to-do list for this page).
Modern Misidentification: Gottlieb writes that the RNGC incorrectly identified NGC 5580 as PGC 214249, which is part of Arp 69. That RNGC error is presumably why Arp mistakenly wrote that Arp 69 was NGC 5579 plus 5580 (see Use By The Arp Atlas in the entry for NGC 5579), instead of NGC 5579 plus PGC 214249.
Physical Information: (Presuming the duplicate entry is correct, NGC 5580 would be the preferred designation)

Historical Identification: Per Dreyer, NGC 5581 (Stephan list XIII (#74), 1860 RA 14 14 54, NPD 65 52.2) is "a very faint star in a very faint, very small, round nebulosity."
Discovery Note: The published date for Stephan's discovery is much later; but a study of his original papers shows that he first observed this object on the date shown above, and the later date is when he obtained a micrometrically measured position.
Physical Information: Apparent size 0.8 by 0.7? arcmin

Historical Identification: Per Dreyer, NGC 5582 (= GC 3854 = JH 1786 = WH II 754, 1860 RA 14 15 02, NPD 49 39.8) is "pretty bright, pretty small, round, brighter middle and faint nucleus, star south-preceding (to southwest)."
Physical Information: Apparent size 2.8 by 1.7? arcmin

Historical Identification: Per Dreyer, NGC 5583 (Swift list III (#80), 1860 RA 14 15 03, NPD 76 08.7) is "very faint, pretty small, round, pretty bright star near."
Physical Information: Apparent size 0.8 by 0.6? arcmin

Historical Identification: Per Dreyer, NGC 5584 (Barnard (d), 1860 RA 14 15 12, NPD 89 44.7) is "faint, large, much extended, diffuse, gradually a little brighter middle." The position precesses to RA 14 22 22.4, Dec -00 23 09, right on the galaxy listed above, the description fits and there is nothing else nearby, so the identity is certain.
Discovery Note: Although Barnard has always been given credit for this discovery, his article in A.N.1884 v108 p369 states that "Mr. Wendell of Harvard Obs." measured the position given in the paper, and adds "This nebula has before been announced, and examined by, among others, Mr. Temple and is here inserted merely as a matter of record." However, no one has found any other reference to Tempel's supposed observation, hence my use of "Perhaps discovered" in the discovery credits.
Physical Information: Based on a recessional velocity of 1640 km/sec, NGC 5584 is about 75 million light years away, in good agreement with redshift-independent distance estimates of 65 to 90 million light years (the most recent and presumably most accurate value, based on measurements of over 600 Cepheid variable stars, is 72 million light years). Given that and its apparent size of 2.45 by 1.65 arcmin, the galaxy is about 50 thousand light years across. It is listed in NED as an isolated galaxy (not a member of any known group or cluster).

Historical Identification: Per Dreyer, NGC 5585 (= GC 3856 = JH 1790 = WH I 235, 1860 RA 14 15 18, NPD 32 38.1) is "pretty faint, large, irregularly round, very gradually much brighter middle, mottled but not resolved." The position precesses to RA 14 19 45.3, Dec +56 43 18, on the southwestern rim of the nucleus of the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Physical Information: Based on a recessional velocity relative to the Cosmic Microwave Background radiation of 395 km/sec (and H₀ = 70 km/sec/Mpc), NGC 5585 is about 18 million light years away, in reasonable agreement with widely-varying redshift-independent distance estimates of about 12 to 35 million light years. Given that and its apparent size of about 5.8 by 3.6 arcmin (from the images below), the galaxy is about 30 thousand light years across (the HST press release states that it is over 35 thousand light years across, but there is no indication of the distance estimate they used). The galaxy is thought to have an unusually large percentage of its mass in the form of "dark matter", but since no one knows what that is (see Dark Matter in Galaxies), what that means is equally unknown.
Note About Brightness: Steinicke lists the visual magnitude as 10.7, but LEDA lists a value of 11.0, NED of 11.2 (though without specifying the filter), and SIMBAD 11.2. Since the LEDA value falls in the middle of the range, that is the value shown in the description at the start of this entry.
Usage By The de Vaucouleurs Atlas: NGC 5585 is used by the de Vaucouleurs Atlas of Galaxy Types as an example of type (R')SAB(s)d, whence its classification above.

Historical Identification: Per Dreyer, NGC 5586 (Swift list III (#81), 1860 RA 14 15 23, NPD 76 10.5) is "extremely faint, very small, round." The position precesses to RA 14 22 07.7, Dec +13 11 03 (whence the position above), but there is nothing there nor near there except NGC 5583, found by Swift on the same night, so that cannot be his #81. Swift's paper adds "nearly between 2 bright stars" to the NGC description, and his position does lie between two bright stars, so the position must be correct, suggesting that Swift either imagined that he saw something that doesn't actually exist, or that what he saw was some transient phenomenon, such as a comet or nova (in other words, that his III #81 must be, as stated above, lost or nonexistent).
About The PGC Designation: As in the case of most NGC/IC objects, HyperLEDA assigned a PGC designation to this object, even though it lost or nonexistent. However, a search of the database for that designation returns no result, so it is shown in quotes.

Historical Identification: Per Dreyer, NGC 5587 (= GC 3857 = JH 1787 = WH III 110, 1860 RA 14 15 30, NPD 75 26.6) is "faint, considerably small, very little extended, 8th magnitude star south-following (to southeast)."
Physical Information: Apparent size 2.6 by 0.8? arcmin

Historical Identification: Per Dreyer, NGC 5588 (= GC 3858 = JH 1789, 1860 RA 14 15 31, NPD 54 14.0) is "very faint, round, gradually brighter middle."
NGC Note: A Note in the NGC reads "(JH) 1789 extremely faint (one observation). Not seen in two Birr observations (in 1855) of (JH) 1788 (= NGC 5589) and (JH) 1791 (= NGC 5590). The group has not been observed elsewhere after 1833."
Physical Information: (this entry will only contain historical information; for physical data and images see NGC 5589)

Historical Identification: Per Dreyer, NGC 5589 (= GC 3859 = JH 1788 = WH III 416, 1860 RA 14 15 31, NPD 54 05.2) is "very faint, small, round, north-preceding (northwestern) of 2," the other being NGC 5590.
Physical Information: Apparent size 1.1 by 1.1? arcmin

Historical Identification: Per Dreyer, NGC 5590 (= GC 3860 = JH 1791 = WH III 417, 1860 RA 14 15 43, NPD 54 09.3) is "considerably faint, small, round, brighter middle like a star, south-following (southeastern) of 2," the other being NGC 5589.
Physical Information: Apparent size 1.8 by 1.8? arcmin

Historical Identification: Per Dreyer, NGC 5591 (Swift III (#82), 1860 RA 14 15 43, NPD 75 40.7) is "extremely faint, small, round, pretty bright star near south-following (to southeast)." The position precesses to RA 14 22 26.7, Dec +13 40 52, about 2 arcmin to the southwest of the galaxy, but there is nothing else nearby and there is an 11th-magnitude star (which in comparison to the nebula would be "pretty bright") to the southeast, so the identification is certain. The object consists of two interacting spiral galaxies, but the description as "round" suggests that what Swift saw was only the core of the brighter galaxy, so that is listed as the NGC object, and the fainter, more diffuse eastern member of the pair (PGC 93125) is usually listed as a companion, instead of as part of the NGC object. However, because of the obvious interaction of the pair, some references do include PGC 93125 in their definition of NGC 5591.
Note About UGC Designation: The colon after UGC 9207 indicates that this is only part of the UGC "object", as UGC 9207 is assigned to the pair of galaxies that are either treated as NGC 5591 (in some references) or as NGC 5591 and its companion (in other references).
Physical Information: Based on a recessional velocity of 7670 km/sec, NGC 5591 is about 360 million light years away. Given that and its apparent size of 1.5 by 0.7 arcmin, it is about 150 thousand light years across.

Discovery Note: A physically interacting companion of NGC 5591, and sometimes listed as part of that NGC object (although as discussed in that entry, it was probably not seen by Swift).
Note About UGC Designation: The colon after UGC 9207 indicates that this is only part of the UGC "object", as UGC 9207 is assigned to the pair of galaxies that are either treated as NGC 5591 (in some references) or as NGC 5591 and its companion (in other references).
Physical Information: Based on a recessional velocity of 7530 km/sec, PGC 93125 its about 350 million light years away, which is essentially the same distance as its obvious companion, and confirms that they are a physical pair 350 to 360 million light years distant. Given that and its apparent size of 1.25 by 0.5 arcmin, PC 93125 is about 130 thousand light years across (most of which is a distended region presumably caused by the interaction of the two galaxies). For images, see NGC 5591.

Historical Identification: Per Dreyer, NGC 5592 (= GC 3861 = JH 3565 = WH III 924, 1860 RA 14 15 48, NPD 118 01.9) is "faint, small, extended, gradually a very little brighter middle, mottled but not resolved."
Physical Information: Apparent size 1.6 by 0.8 arcmin (from images below)

Historical Identification: Per Dreyer, NGC 5593 (= GC 3862 = JH 3566, Dunlop #357, 1860 RA 14 16 13, NPD 144 09.9) is "a cluster, very little rich, very little compressed, stars of 10th magnitude."
An Error of Attribution: As noted below, Dunlop's published catalog had an error in the position of his #357, and as a result Herschel (and therefore Dreyer) mistakenly assumed that he had also observed this cluster, though how Herschel could have thought that Dunlop's description fit such a sparse grouping is hard to understand.
 I became aware of this error thanks to a note on Gottlieb's website. It states that Dunlop did not observe this cluster, and only received credit for an observation because there was a transcription error in his RA for Dunlop 357, which was actually an observation of NGC 5822. (Per a private correspondence, he learned about the transcription error by going through microfilms of Dunlop's 400+ pages of poorly organized notes.) As it happens, a paper by Glen Cozens et al gives a list of 'copying errors' in Dunlop's published catalog, showing that Dunlop's RA of (1827) 14 50 was published as 14 15 (Cozens' thesis suggests that Dunlop's Scottish accent may have led to the error, as he read his notes aloud to an English printers' assistant), but despite being aware of that error (per his thesis, from the same microfilms of Dunlop's notes), Cozens' papers still assigned D#357 to NGC 5593.
 Because of this disagreement I precessed the discordant positions. Dunlop's published position for D#357 precesses to (2000) RA 14 26 56, Dec -54 30, which is 17 minutes of declination north of NGC 5593, and between this substantial error and the fact that NGC 5593 is a sparse small cluster, I decided that it wasn't a good fit for Dunlop's description of #357: "A very extensive cluster of stars of mixed small magnitudes; the stars appear to be either congregating together in different parts of the cluster, or breaking up; there are several groups already formed, the whole cluster is composed of lines of stars, but no general attraction towards any particular point."). On the other hand, Dunlop's original position precesses to (2000) RA 15 02 34, Dec -54 24 30, which lies only about a minute of time to the west of NGC 5822, not far outside its extensive outline, and that cluster perfectly fits Dunlop's description. As a result I feel certain that Gottlieb is absolutely correct, and that Dunlop 357 was an observation of NGC 5822, hence my change in the attribution of D357 in the list of discoverers above, and in the entry for NGC 5822.
About The PGC Designation: As is the case for most NGC/IC objects, HyperLEDA assigned a PGC designation for this object, even though it isn't a galaxy; but as is also often the case, a search of the database for that designation returns no result, so it is shown in quotes.
Physical Information: Apparent size 6? arcmin per SEDS

Historical Identification: Per Dreyer, NGC 5594 (= GC 3863 = WH III 135, 1860 RA 14 16 25, NPD 62 58.6) is "extremely faint, very small, stellar." However, a note in Dreyer's 1912 Corrections to the New General Catalogue states that the PD should be 63 08 (see the second paragraph in the NGC Note below). The corrected position precesses to RA 14 22 41.8, Dec +26 13 38, but there is nothing there. However, there is a suitable candidate about 30 seconds of time to the east and just over 2 arcmin north of that position, and there is nothing else in the region, so the galaxy listed above must be NGC 5994.
NGC Note: A Note at the end of the NGC quotes John Herschel: "(WH) III 135. Auwers' P.D. for 1830 is 63° 0'; C.H. gives 62° 50' 20". Auwers has used (P.T.) 1° 5' north of d 12 Bootis (sic), C.H. 1° 16' north of the same star. C. H. is to be preferred on every account to P.T. Her N.P.D.s are grounded on a most complete and searching re-examination and recomputation (according to the then existing star catalogues) of all the data (in the earlier sweeps most obsure ― "foliis Sibyllinis obscuriora" ["darker than the Sybilline leaves"]) for determining the degrees and minutes of P.D. from the index numbers. In almost every case I find her corrections (or rather interpretations) to be justified, and I have no doubt that in this particular instance such will prove to be the case, though here I confess myself, after consulting the original sweep, unable to perceive the reason for the deviation." (12 Boo = d Boo in early catalogs; whence Herschel's "d 12".)
 JH's comment led to Dreyer adopting Caroline Herschel's NPD, instead of Auwers', in the NGC; but as it turned out, Herschel's inability to confirm his aunt's NPD was due to Auwers' value being the correct one, as shown by the correction in Dreyer's 1912 paper. The error in the NGC is also the reason that Javelle's later observation of the galaxy led to the duplicate entry as IC 4412
Physical Information: Apparent size 1.1 by 0.6? arcmin

Historical Identification: Per Dreyer, NGC 5595 (= GC 3864 = JH 1792 = WH III 121, 1860 RA 14 16 33, NPD 106 05.1) is "faint, pretty large, round, very gradually brighter middle, preceding (western) of 2," the other being NGC 5597
Observational Note: Gottlieb writes "Based on a Franklin-Adams photograph taken in April 1911, H. E. Woods described NGC 5595 as a 'spiral nebula; diameter 55", about 12th magnitude.' At the Helwan observatory, Knox-Shaw (1924) described it as a 'curious single branch spiral, arms being formed of straight portions, absorbed [dust] on south-following side.'."
Note About The PGC Designation: Even in the original Principal Galaxy Catalog there are occasional duplicate entries, and in the computerized versions that contain millions of objects, there are far more. When there are multiple designations the lowest number is preferred, but the other numbers sometimes crop up, so they are shown here for completeness.
Physical Information: Apparent size 2.1 by 1.2 arcmin (from images below)

Historical Identification: Per Dreyer, NGC 5596 (= GC 3865 = JH 1795 = WH III 418, 1860 RA 14 16 41, NPD 52 14.4) is "extremely faint, small, round, stellar."
Physical Information: Apparent size 1.1 by 0.8? arcmin

Historical Identification: Per Dreyer, NGC 5597 (= GC 3866 = JH 1793 = WH III 122, 1860 RA 14 16 47, NPD 106 07.6) is "very faint, large, very little extended, very gradually a little brighter middle, following (eastern) of 2," the other being NGC 5595.
Observational Note: Gottlieb writes "Based on a Franklin-Adams photograph taken in April 1911, H.E. Woods described NGC 5597 as a 'small round nebula with bright nucleus; about 60" diameter; magnitude 12.5.'."
Physical Information: Apparent size 2.2 by 1.5 arcmin. Binuclear, so its structure probably represents a late stage in the merger of two galaxies.

Historical Identification: Per Dreyer, NGC 5598 (= GC 3867 = JH 1796 = WH III 733, 1860 RA 14 16 50, NPD 49 02.5) is "faint, very small, round, brighter middle."
Physical Information: Apparent size 1.6 by 1.1? arcmin

Historical Identification: Per Dreyer, NGC 5599 (= GC 3868 = JH 1794 = WH III 927, 1860 RA 14 16 54, NPD 82 46.8) is "faint, small, a little extended."
Physical Information: Apparent size 1.4 by 0.5? arcmin