Apparent size 0.5 by 0.3 arcmin.

Apparent size 1.6 by 0.7 arcmin.

Apparent size 1.1 by 0.3 arcmin.

Apparent size 0.9 by 0.4 arcmin.

Apparent size 1.7 by 0.5 arcmin.

The second IC lists a corrected RA (per Howe) of 23 34 26. Apparent size 0.9 by 0.7 arcmin.

Apparent size 0.7 by 0.4 arcmin.

Apparent size 1.3 by 0.5 arcmin.

2.0 by 0.5 arcmin.

Apparent size 1.4 by 0.2 arcmin.

Based on a recessional velocity of 21090 km/sec, a straightforward calculation indicates that IC 1510 is about 980 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 pair was about 900 million light years away when the light by which we see them left them, about 930 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 their apparent sizes (0.7 by 0.6 arcmin for PGC 1215207 and 0.6 by 0.4 arcmin for PGC 72589), the galaxies are about 180 and 160 thousand light years across.

Apparent size 1.0 by 0.3 arcmin.

(this entry will mostly contain historical information; for anything else see NGC 7776)

Apparent size 1.2 by 1.0 arcmin. A Seyfert galaxy (type Sy 2). Probably near and possibly a physical companion of IC 1516.

Probably near and possibly a physical companion of IC 1515. Although the brighter central region is only about 1.1 by 1.0 arcmin in size, the outer arms cover about twice that distance.

Apparent size 0.8 by 0.8 arcmin.

Apparent size 0.3 by 0.2 arcmin. IC 1518 and 1519 appear to be a physical pair, but their recessional velocities differ by nearly 3000 km/sec (11480 km/sec for IC 1518, compared to 8860 km/sec for IC 1519), so they are almost certainly an optical double. (Note to self: LEDA says PGC 73010 is IC 1518, and PGC 73011 is IC 1519. NED and Steinicke say the reverse. Need to find out which is correct.)

Apparent size 0.7 by 0.6 arcmin. IC 1518 (which see for images) and 1519 appear to be a physical pair, but their recessional velocities differ by nearly 3000 km/sec (11480 km/sec for IC 1518, compared to 8860 km/sec for IC 1519), so they are almost certainly an optical double. (Note to self: LEDA says PGC 73010 is IC 1518, and PGC 73011 is IC 1519. NED and Steinicke say the reverse. Need to find out which is correct.)

Although Arp 50 is supposedly an example of a spiral galaxy with a small, bright companion, there is no obvious brightening which might be associated with another galaxy; the irregular brightness appears to be intrinsic to the galaxy. Still, most catalogs list it as a galaxy pair, though without any indication of where the second galaxy is supposed to be. Based on its recessional velocity of 9025 km/sec, IC 1520 is about 420 million light years away. Given that and its apparent size of 0.5 by 0.5 arcmin, it is about 60 thousand light years across.

Apparent size 0.5 by 0.3 arcmin.

Apparent size 1.0 by 0.3 arcmin.

Apparent size 0.3 by 0.2 arcmins; recessional velocity about 20000 km/sec (about a billion light years away).

Apparent size 1.7 by 0.7 arcmin. (Note: There is considerable confusion about the identification of this object. There is little doubt that the face-on spiral shown as IC 1524 in the images below is the correct IC 1490 and 1524. However, the edge-on galaxy to its south is incorrectly listed as IC 1524 in several references (in the MCG, LEDA and Wikisky), and the correct PGC number of each may be in doubt, as the face-on spiral is shown as PGC 73143 in most references, but as PGC 73151 in others. Hence my decision to show what is almost certainly the correct object in this entry, but put off figuring out the gory details until the next iteration of this page.)

Per Dreyer, IC 1525 (= Swift's list IX (#100), 1860 RA 23 52 54, NPD 43 54.2) is "extremely faint, pretty small". The position precesses to RA 00 00 01.2, Dec +46 52 34, over 45 seconds of time east of the galaxy; but the galaxy is so obviously the only possible candidate, and the error so characteristic for Swift's later discoveries (Dreyer noted the excellent quality of Swift's earlier observations, but lamented their later deterioration) that no one seems to doubt the identification. Based on a recessional velocity of 5020 km/sec, IC 1525 is about 235 million light years away. Given that and its apparent size of 1.9 by 1.4 arcmin, it is about 130 thousand light years across. IC 1525 is listed as a member of Local Galaxy Group 485, which also contains PGC 2 and 676. It is also listed as a member of WBL729, a group with an average recessional velocity of about 5020 km/sec which also includes PGC 18 and 73195; so all five galaxies may be physically related. PGC 2, 18 and 73195 and IC 1525 are less than 30 arcmin apart, and if at nearly the same distance from us, may be within a region less than two million light years across; but PGC 676 is quite a bit further away, being about 2 1/2 degrees east of the other group members.

Apparent size 0.5 by 0.3 arcmin.

Apparent size 1.3 by 0.7 arcmin.

Apparent size 2.4 by 1.1 arcmin.

Apparent size 1.2 by 1.1 arcmin.

Per Dreyer, IC 1530 (= Bigourdan 357, 1860 RA 00 00 06, NPD 58 10) is "very faint, small, irregular figure, brighter middle". The position precesses to RA 00 07 18.2, Dec +32 36 46, only about 0.3 arcmin northwest of the center of the galaxy, so the identification is certain. However, as noted at NGC 7831 (which see for images and a discussion of the object), Swift's earlier position was off by more than a second of time and 8 arcmin of declination, so neither Dreyer nor Bigourdan had any reason to suspect that the object had already been discovered; hence the double listing.

Apparent size 1.8 by 1.4 arcmin.

Apparent size 1.6 by 0.5 arcmin. More edge-on than not, so the type is hard to determine from the relatively poor images available.

Historical Identification:
Discovery Note: Barnard's observations of IC 1534, 1535 and 1536 (and several other nebulae), though made in 1888, were not recorded in a paper until 1897, and the envelope containing the paper was mislaid for nine years, so it wasn't published until 1906!
Physical Information: Apparent size 1.0 by 0.5 arcmin. Recessional velocity 5225 km/sec. Part of a group with IC 1535 and 1536 (and most likely NGC 48, NGC 49 and NGC 50).

Historical Identification:
Discovery Note: Barnard's observations of IC 1534, 1535 and 1536 (and several other nebulae), though made in 1888, were not recorded in a paper until 1897, and the envelope containing the paper was mislaid for nine years, so it wasn't published until 1906!
Physical Information: Apparent size 1.3 by 0.3 arcmin. Recessional velocity 5230 km/sec. Part of a group with IC 1534 and 1536 (and most likely NGC 48, NGC 49 and NGC 50).

Historical Identification:
Discovery Note: Barnard's observations of IC 1534, 1535 and 1536 (and several other nebulae), though made in 1888, were not recorded in a paper until 1897, and the envelope containing the paper was mislaid for nine years, so it wasn't published until 1906!
Physical Information: Apparent size 0.7 by 0.5 arcmin. Recessional velocity 5105 km/sec. Part of a group with IC 1534 and 1535 (and most likely NGC 48, NGC 49 and NGC 50).

Part of NGC 55, which see for images.

Historical Identification: Per Dreyer, NGC IC 1539 (= Bigourdan 359, 1860 RA 00 11 08, NPD 60 41) is "extremely faint, between two 13th-magnitude stars". The position precesses to RA 00 18 25.2, Dec +30 05 41, which is about 1.2 arcmin northeast of the galaxy, and not far from Mitchell's equally poor position (as discussed at NGC 70). However, the two 13th magnitude stars flanking the galaxy, which were noted by both observers, confirm the identity of the two listings.
Physical Information: Given the duplicate entry, see NGC 70 for anything else.

Apparent size 0.9 by 0.4 arcmin.

Apparent size 0.6 by 0.2 arcmin.

Apparent size 0.7 by 0.5 arcmin.

Apparent size 0.7 by 0.7 arcmin.

Apparent size 1.2 by 0.8 arcmin.

Apparent size 0.3 by 0.2 arcmin.

More properly called IC 1546, but often called NGC 85B due to its proximity to NGC 85 (which see for images).

Apparent size 0.9 by 0.7 arcmin.

Apparent size 0.8 by 0.8 arcmin.