Historical Identification: Per Dreyer, NGC 1200 (= GC 644 = JH 2506 = WH II 475, 1860 RA 02 57 15, NPD 102 32.5) is "pretty faint, considerably large, irregularly round, brighter middle, northeastern of 2", the other being 1196.
Physical Information: Based on a recessional velocity of 4050 km/sec, NGC 1200 is about 180 million light years away (using H = 73 km/sec/Mpc). Given that and its apparent size of about 3.6 by 2.4 arcmin (from the images below), it is about 190 thousand light years across. Although their recessional velocity distances round off to somewhat different values, the radial velocities of NGC 1200 and 1195 are sufficiently close (only differing by 140 km/sec) that they may actually be physical companions, with a separation as small as a few tens or hundreds of thousands of light years. However, no one else seems to have suggested the idea, and in the absence of obvious physical interaction it is just as possible that they are several million light years apart.

Historical Identification: Per Dreyer, NGC 1201 (= GC 645 = JH 283 = WH I 109, 1860 RA 02 58 04, NPD 116 35.8) is "considerably bright, pretty small, very little extended, mottled but not resolved, small (faint) star near".
Physical Information: Apparent size of about 3.4 by 1.9 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1202 (Ormond Stone list II (#354), 1860 RA 02 58 32, NPD 97 02.1) is "extremely faint, small, two stars 4 arcmin northeast". The position precesses to RA 03 05 26.4, Dec -06 29 19, about 6 arcmin east of the most likely candidate for what Stone observed; but as noted by Corwin, the double star to the northeast of PGC 11593 makes the identification certain.
Physical Information: Apparent size of about 0.65 by 0.55 arcmin (from the images below)

Historical Identification: Per Dreyer, NGC 1203 (Leavenworth list I (#85), 1860 RA 02 58 35, NPD 104 55.1) is "very faint, small, round, brighter middle and nucleus (nebulous?)". As noted in the entry below, PGC 11599 is usually listed as part of NGC 1203, but it is too faint for Leavenworth to have noticed, and his description of NGC 1203 would have stated that it was extended north-south instead of round, if he had noticed the fainter galaxy. Therefore, as suggested by Corwin, the northern galaxy, though probably a physical companion of NGC 1203, is not actually part of the NGC object.
Physical Information: Apparent size of about 0.65 by 0.5 arcmin (from the images below). Given their distorted shapes, NGC 1203 is probably interacting with PGC 11599, which undoubtedly encourages the misidentification of the pair as the NGC object.

Historical Misidentification: As noted in the entry for NGC 1203 (which see for images), PGC 11599 cannot have been seen by Leavenworth, so its inclusion as part of NGC 1203 in most catalogs is an error.
Physical Information: Apparent size of about 0.25 by 0.2 arcmin (based on the images of NGC 1203). Given their distorted shapes, NGC 1203 is probably interacting with PGC 11599.

Historical Identification: Per Dreyer, NGC 1204 (Leavenworth list I (#86), 1860 RA 02 58 35, NPD 102 53.1) is "extremely faint, extended 45°, mottled but not resolved, several stars involved". The second Index Catalog lists a corrected RA (per Howe) of 02 58 00. The position precesses to RA 03 04 40.5, Dec -12 20 13, on the northern edge of the galaxy listed above and the description fits perfectly, so the identification is certain.
Physical Information: Apparent size of about 1.4 by 0.5 arcmin (from the images below). A Seyfert galaxy (type Sy 2).

Historical Identification: Per Dreyer, NGC 1205 (Ormond Stone list I (#87), 1860 RA 02 58 35, NPD 100 14.1) is "extremely faint, pretty small, extended 25°, 9.5 magnitude star 3 arcmin southwest". The position precesses to RA 03 05 21.8, Dec -09 41 18, but there is nothing there. As stated in the entry for NGC 1182, Stone apparently made two observations of the same object, with one (NGC 1182) being recorded to the west of the actual galaxy, and the other (NGC 1205) to the east; but the descriptions are nearly identical (most tellingly, concerning the star to the southwest), presuming that "extended 25°" in the description of NGC 1205 is a typographical error for "extended 125°", and the second Index Catalog stated (per Howe, based on 2 observations) "1205 is the same as 1182"; so their equivalence has been known for more than a century.
Physical Information: Given the duplicate entry, see NGC 1182 for anything else.

Historical Identification: Per Dreyer, NGC 1206 (Leavenworth list II (#355), 1860 RA 02 59 14, NPD 99 23.1) is "extremely faint, very small, very little extended 0°".
Physical Information: Apparent size of about 0.75 by 0.65 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1207 (= GC 646 = JH 284 = WH III 578, 1860 RA 02 59 20, NPD 52 09.4) is "considerably faint, very small, round, pretty suddenly brighter in west-northwestern end". The position precesses to RA 03 08 15.8, Dec +38 23 07, almost dead center on the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Discovery Note: Neither of the Herschels mentioned the bright region in the west-northwestern end. That part of the NGC entry was based on observations at Birr Castle using Lord Rosse's 72-inch "Leviathan", hence my addition of the observation of Nov 18, 1862 (presumably done by the 3rd Lord Rosse's assistant, who at the time was Samuel Hunter), and the observation of Dec 27, 1877, presumably done by Dreyer himself, as he was the assistant at that time, said observations having been published in compilations of the Birr Castle observations 'read' in 1875 and 1878, and published in 1879 - 1880. Corwin states that per Gary Kronk, Swift also observed this object, but whether he published any mention of his observation or merely noted it in one of the letters Kronk has examined as part of his research for a biography of Swift is not clear, and it is only mentioned here because of the tremendous effort Kronk has put into his research.
Physical Information: Based on a recessional velocity relative to the Cosmic Microwave Background radiation of 4625 km/sec (and H₀ = 70 km/sec/Mpc), NGC 1207 is about 215 million light years away, in good agreement with redshift-independent distance estimates of about 205 to 215 million light years. Given that and its apparent size of about 1.6 by 1.1 arcmin (from the images below), the galaxy is about 100 thousand light years across.

Historical Identification: Per Dreyer, NGC 1208 (= GC 647 = JH 285 = JH 2507 = WH II 285, 1860 RA 02 59 25, NPD 100 05.1) is "pretty bright, small, a little extended 80°±, a little brighter middle". (Note: The galaxy lies less than a minute of time directly west of NGC 1214, one of the members of Hickson Compact Group 23.)
Physical Information: Apparent size of about 2.1 by 1.0 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1209 (= GC 648 = JH 286 = WH II 504, 1860 RA 02 59 30, NPD 106 08.7) is "bright, small, considerably extended, pretty suddenly brighter middle".
Physical Information: Apparent size 4.0 by 1.8 arcmin? In the images below the galaxy appears to have a slightly X-shaped profile, hence my classification of it as a peculiar lenticular galaxy. Despite that, it is used by the de Vaucouleurs Atlas of Galaxies as an example of galaxy type E⁺6.

Historical Identification: Per Dreyer, NGC 1210 (Ormond Stone list I (#88), 1860 RA 02 59 40, NPD 116 17.1) is "extremely faint, very small, irregularly round, gradually brighter middle and nucleus".
Physical Information: Apparent size of about 1.4 by 1.25 arcmin (from images below)

Historical Identification: Per Dreyer, NGC 1211 (Stephan list IX (#??), (Safford 102), 1860 RA 02 59 45, NPD 91 20.3) is "pretty bright, very small, round, much brighter middle and nucleus equivalent to a 9th or 10th magnitude star".
Discovery Notes: As discussed elsewhere, Safford's observations were not published (and then only in an obscure paper) until Dreyer had essentially completed the NGC, and was merely editing it; as a result his discoveries were only noted in an appendix at the end of the paper, and not added to the individual NGC entries.
Physical Information: Apparent size 2.1 by 1.9 arcmin? Used by the de Vaucouleurs Atlas of Galaxies as an example of galaxy type (R₁R₂')SB(rl)0/a.

Historical Identification: Per Dreyer, NGC 1212 (Swift list I (#5), 1860 RA 02 59 54, NPD 49 38.9) is "extremely faint, small, round, Algol near". The position precesses to RA 03 08 59.9, Dec +40 53 32, about 8 arcmin to the west of the galaxy now identified as NGC 1212. Per Corwin, this identification is based on Swift's original note (not stated in the NGC) that the nebula was "Right angled with 2 stars", which is a reasonable fit to PGC 11815 (which has exactly the right declination) and the stars to its east and northeast; so despite the error in right ascension, the identification with PGC 11815 seems reasonably certain. Some references list PGC 11761 as NGC 1212 (usually while giving the position and physical data for PGC 11815!), so that galaxy is discussed in the entry immediately following this one. But as shown in the wide-field image below, Swift could not possibly have seen that much fainter galaxy against the glare from Algol. (As discussed at the entry for IC 1883, Swift's large error in right ascension made the later "discovery" and double listing almost inevitable.)
Physical Information: Apparent size of about 0.85 by 0.5 arcmin (from the images below)

Historical Misdentification: As noted in the entry for NGC 1212 and shown in the wide-field image below, PGC 11761 is far too faint and too close to Algol for Lewis Swift to have had any chance of seeing it; so its identification as his NGC object is certainly wrong. However, LEDA still lists NGC 1212 as PGC 11761, and such errors are certain to persist for a long time (and perhaps forever), hence this warning.
Physical Information: The galaxy appears to have a double nucleus and considerably distorted arms, suggesting that it is actually two galaxies in collision. Apparent size of about 0.45 by 0.35 arcmin for the central galaxy. If the northern extension of the western arm is real and not merely an artifact created by the image of the nearby star (and several mosaic artifacts in the northeastern portion of the original image), then the extended arm is about 0.7 arcmin long (from the images below). Nothing else currently available.

Historical Identification: Per Dreyer, NGC 1213 (Swift list I (#6), 1860 RA 02 59 57, NPD 51 54.5) is "extremely faint, a little extended, star close to north, difficult". The position precesses to RA 03 08 54.0, Dec +38 37 56, about 4 1/2 arcmin west southwest of PGC 11789, a very faint galaxy involved with several stars that nicely fits the description. Given Swift's perennial problems with right ascension, the identity with that galaxy seems reasonably certain. (As discussed at the entry for IC 1881, Swift's error in right ascension made the later "discovery" and double listing almost inevitable.)
Physical Information: Apparent size of about 2.5 by 1.8 arcmin (from the images below).

Physical Information: Apparent size of about 0.65 by 0.55 arcmin (from the images below). A member of Hickson Compact Group 23.

Historical Identification: Per Dreyer, NGC 1214 (Swift list V (#49), Ormond Stone list I (#??), 1860 RA 03 00 08, NPD 100 05.1) is "faint, pretty small, irregularly round, h 285 to west", (JH) 285 being NGC 1208.
Discovery Information: Stone's paper was sent to the Astronomical Journal on October 12, 1886, so all the observations listed there must have been completed before that date; but since the paper wasn't actually in print at the time of Swift's observation, he did make an independent discovery of the object.
Physical Information: Apparent size of about 1.4 by 0.4 arcmin (from the images below). A member of Hickson Compact Group 23.

Historical Identification: Per Dreyer, NGC 1215 (Swift list V (#50), Ormond Stone list I (#??), 1860 RA 03 00 18, NPD 100 07.8) is "extremely faint, very small, round".
Discovery Information: Stone's paper was sent to the Astronomical Journal on October 12, 1886, so all the observations listed there must have been completed before that date; but since the paper wasn't actually in print at the time of Swift's observation, he did make an independent discovery of the object.
Physical Information: Apparent size of about 1.6 by 1.1 arcmin (from the images below). A member of Hickson Compact Group 23.

Historical Identification: Per Dreyer, NGC 1216 (Ormond Stone list I (#96), 1860 RA 03 00 30, NPD 100 09) is "extremely faint, small, stellar, 3rd of 3", the others presumably being NGC 1214 and 1215.
Physical Information: Apparent size of about 0.9 by 0.15 arcmin (from the images below). A member of Hickson Compact Group 23.

Historical Identification: Per Dreyer, NGC 1217 (= GC 649 = JH 2508, 1860 RA 03 00 48, NPD 129 34.4) is "pretty faint, small, round, pretty suddenly brighter middle".
Physical Information: Apparent size 1.8 by 1.3 arcmin? Vr 6290 km/sec. Close to and probably interacting with PGC 11642.

Physical Information: Apparent size 0.5 by 0.4 arcmin? Vr 6490 km/sec. Close to and probably interacting with NGC 1217, which see for images.

Historical Identification: Per Dreyer, NGC 1218 (Swift list IV (#12), 1860 RA 03 01 02, NPD 86 26.1) is "pretty faint, pretty small, round".
Physical Information: Apparent size 1.3 by 1.0 arcmin? HST images show a 6 or 7 arcsec long jet extending northeastward from the center of the nucleus (per HLA).

Historical Identification: Per Dreyer, NGC 1219 (= GC 5298, Marth #87, 1860 RA 03 01 12, NPD 88 26) is "faint, pretty large, round".
Physical Information: Apparent size of about 1.1 by 0.95 arcmin (from the images below). A Seyfert galaxy?

Historical Identification: Per Dreyer, NGC 1220 (= GC 650 = JH 287, 1860 RA 03 01 29, NPD 37 11.9) is a "cluster, very small, stars very faint". The position precesses to RA 03 11 40.2, Dec +53 20 12, only 0.6 arcmin south southwest of the center of the cluster listed above, and depending on how large the cluster is considered to be, either within or near its border. LEDA lists NGC 1220 as PGC 3517882 (and as a cluster), but a search of the database for that designation returns no result.
Physical Information: Apparent size of about 1.4 arcmin if only the centrally compressed group of stars, but about 1.9 arcmin if the stars to the west, northwest and south are included (if they are, the RA is 03 11 39.0, as listed in Corwin's database).

Historical Identification: Per Dreyer, NGC 1221 (Leavenworth list II (#356), 1860 RA 03 01 36, NPD 94 48.0) is "extremely faint, very small, extended 170°, star to south". The second Index Catalog lists a corrected RA of 03 01 16, and adds "= Bigourdan 255". The corrected position precesses to RA 03 08 15.5, Dec -04 15 37, right on a galaxy that exactly matches the description, so the identification is certain.
Physical Information: Apparent size of about 1.35 by 0.5 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1222 (Stephan list XIII (#23), 1860 RA 03 01 55, NPD 93 29.6) is "very faint star in pretty faint, small, round nebula".
Physical Information: The apparent size of the central galaxy is about 1.0 by 0.65 arcmin (from the images below); with its northern and southeastern extensions it spans about 2.6 by 1.0 arcmin (from the images below). A HST image released on Nov 7, 2016 shows that the main galaxy is absorbing two dwarf galaxies, creating "starburst" activity in all three galaxies.

Historical Identification: Per Dreyer, NGC 1223 (Leavenworth list II (#357), 1860 RA 03 02 06, NPD 94 41.0) is "extremely faint, small, round, gradually brighter middle and nucleus, preceding (western) of 2", the other being NGC 1225. The second Index Catalog lists a corrected RA of 03 01 20, and adds "= Bigourdan 256". The corrected position precesses to RA 03 08 19.8, Dec -04 08 38, right on the galaxy, so the identification is certain.
Physical Information: Apparent size of about 1.3 by 1.3 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1224 (Swift list II (#28), 1860 RA 03 02 06, NPD 49 09.8) is "extremely faint, very small, round".
Physical Information: Apparent size of about 1.2 by 0.95 arcmin (from images below). Suggestion of classification as peculiar is based on the arc of dusty material around the nucleus.

Historical Identification: Per Dreyer, NGC 1225 (Leavenworth list II (#358), 1860 RA 03 02 18, NPD 94 38.0) is "extremely faint, very small, round, following (eastern) of 2", the other being NGC 1223. The second Index Catalog lists a corrected RA of 03 01 48, and adds "= Bigourdan 257". The corrected position precesses to RA 03 08 47.8, Dec -04 08 42, nearly three arcmin south of the galaxy, but the stated relationship to NGC 1223 makes the identification certain.
Physical Information: Apparent size of about 1.4 by 0.6 arcmin (from images below).

Historical Identification: Per Dreyer, NGC 1226 (Stephan list X (#16), 1860 RA 03 02 19, NPD 55 09.0) is "faint, very small, round, brighter middle".
Discovery Notes: See NGC 832 for that entry's recent identification as a misrecording of d'Arrest's observation of NGC 1226.
Physical Information: Apparent size of about 1.6 by 1.1 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1227 (Stephan list X (#17), 1860 RA 03 02 22, NPD 55 13.3) is "very faint, very small".
Physical Information: Apparent size of about 1.0 by 0.85 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1228 (Leavenworth list II (#359), 1860 RA 03 02 58, NPD 113 28.0) is "extremely faint, extremely small, round, gradually brighter middle, preceding (western) of 2", the other being NGC 1229. The second Index Catalog lists a corrected RA (per Howe) of 03 01 59. The corrected position precesses to RA 03 08 11.3, Dec -22 55 40, on the southern edge of the appropriate galaxy, so the identification is certain.
Physical Information: Apparent size of about 1.6 by 0.8 arcmin for the main galaxy (from the images below), and 2.4 by 0.8 arcmin, including the southwestern extension. Part of Arp 332, an example of a galaxy chain supposedly centered near NGC 1230; though only the three NGC objects are part of a physical grouping.

Historical Identification: Per Dreyer, NGC 1229 (Leavenworth list II (#360), 1860 RA 03 02 58, NPD 113 31.0) is "extremely faint, extremely small, round, gradually brighter middle, following (eastern) of 2", the other being NGC 1228. The second Index Catalog lists a corrected RA (per Howe) of 03 01 59. The corrected position precesses to RA 03 08 11.2, Dec -22 58 40, an arcmin south of the appropriate galaxy, but the relative positions of NGC 1229 and 1230 and their precessed NGC positions makes their identification certain.
Physical Information: Apparent size of about 1.6 by 0.9 arcmin (from the images below). A Seyfert galaxy (type Sy 2). Part of Arp 332, an example of a galaxy chain supposedly centered near NGC 1230; though only the three NGC objects are part of a physical grouping.

Historical Identification: Per Dreyer, NGC 1230 (Leavenworth list II (#361), 1860 RA 03 03 10, NPD 113 33.0) is "perhaps a faint star". The second Index Catalog lists a corrected RA (per Howe) of 03 02 04 and adds "12th magnitude star in extremely faint nebula". The corrected position precesses to RA 03 08 16.1, Dec -23 00 40, about one and a half arcmin south of the appropriate galaxy, but the relative positions of NGC 1229 and 1230 and their precessed NGC positions makes their identification certain.
Physical Information: Apparent size of about 0.6 by 0.2 arcmin for the main galaxy, but with its faint southern extension, about 0.7 by 0.35 arcmin (from the images below). Part of Arp 332, an example of a galaxy chain supposedly centered near NGC 1230; though only the three NGC objects are part of a physical grouping.

Historical Identification: Per Dreyer, NGC 1231 (Leavenworth list I (#97), 1860 RA 03 03 (00), NPD 106 07.0) is "extremely faint, pretty large, extended (perhaps nebulous)".
Physical Information: Apparent size of about 0.9 by 0.8 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1232 (= GC 651 = JH 2509 = WH II 258, 1860 RA 03 03 27, NPD 111 07.0) is "pretty bright, considerably large, round, gradually brighter middle, mottled but not resolved". The position precesses to RA 03 09 45.5, Dec -20 34 53, almost dead center on 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 1445 km/sec (and H₀ = 70 km/sec/Mpc), NGC 1232 is about 65 to 70 million light years away, in good agreement with redshift-independent distance estimates of about 30 to 75 million light years (the ESO press releases use a distance of about 60 million light years). Given that and its apparent size of about 7.35 by 6.3 arcmin (from the images below), the galaxy is about 140 to 145 thousand light years across. X-ray images of the galaxy show that it has a broad region of X-radiation emitted by gases with temperatures ranging from about 6 million to tens of millions of degrees. Those gases were presumably heated up by a multitude of hot, bright stars and resulting supernovae caused by an interaction with some smaller galaxy. That galaxy is generally assumed to be PGC 11834, the small peculiar spiral near the eastern edge of NGC 1232; but as noted in the entry for that object, there is something drastically wrong with one or more measures of its distance, so although it may be a physical companion of NGC 1232 and the galaxy responsible for the presumed interaction, it might be a far more distant background galaxy, and only a re-measurement of its recessional velocity can determine which is correct.
Usage By The Arp Atlas: NGC 1232 and its presumed companion comprise Arp 41, which is used as an example of a spiral galaxy with a low surface brightness companion. In the Atlas, Arp notes "Companion spiral wound in same sense as parent. Note split of companion's arm further into center."

Warning About Non-Standard Designation: There is no standard for assigning letter designations to NGC/IC objects, and as a result it is not unusual for a given galaxy to have two or more different letter designations, and for two or more galaxies to have the same designation. Needless to say this can produce considerable confusion, and in the present case, may be the cause of the irreconcilable distance estimates shown immediately below. As a result, such non-standad designations should never be used, and the use of "NGC 1232A" here is only done as a warning.
Physical Information: Based on a recessional velocity relative to the Cosmic Microwave Background radiation of 6440 km/sec (and H₀ = 70 km/sec/Mpc), PGC 11834 is about 300 million light years away, in utterly inconceivable disagreement with a single redshift-independent distance estimate of only about 65 to 70 million light years (in other words, about the same distance as its apparent companion, NGC 1232). One possible explanation for the huge difference in the two methods of determining the galaxy's distance may be that it has been assigned the recessional velocity for a completely different galaxy; but barring a re-measurement of its recessional velocity there is no way to know whether it is truly a physical companion to NGC 1232, or merely a far more distant optical double. If it is a companion of NGC 1232 and only about 65 to 70 million light years away, its apparent size of about 1.15 by 0.75 arcmin (from the image below) would make it about 20 thousand light years across; but if it is a far more distant background galaxy, it would be about 100 thousand light years across.
Usage By The Arp Atlas: NGC 1232 and its presumed companion comprise Arp 41, which is used as an example of a spiral galaxy with a low surface brightness companion. In the Atlas, Arp notes "Companion spiral wound in same sense as parent. Note split of companion's arm further into center."

Historical Identification: Per Dreyer, NGC 1233 (= GC 5299, Stephan list III (#20), 1860 RA 03 03 31, NPD 51 12.7) is "faint, very small, round, diffuse". The position precesses to RA 03 12 32.3, Dec +39 19 12, only 0.2 arcmin west of the center of the galaxy, so the identification is certain. For a discussion of the possible double listing, see NGC 1235.
Physical Information: Based on a recessional velocity of 4390 km/sec, NGC 1233 is about 205 million light years away. (A second recessional velocity measurement of 4890 km/sec would put the galaxy 20 million light years further away.) Given that and its 1.8 by 0.6 arcmin apparent size, the galaxy is about 110 thousand light years across.

Historical Identification: Per Dreyer, NGC 1234 (Leavenworth list II (#362), 1860 RA 03 03 32, NPD 98 23.0) is "extremely faint, small, irregularly round, star or stars involved".
Physical Information: Apparent size 1.8 by 0.9 arcmin?

Historical Identification: Per Dreyer, NGC 1235 (Swift list V (#51), 1860 RA 03 03 49, NPD 51 36.2) is "very faint, small, a little extended". The position precesses to the one listed above, but there is nothing at or near that location. The nearest nebular object is NGC 1233, which would correspond to the description, but lies almost half a degree to the north. Since similar (and even larger) positional errors do occasionally occur in the NGC, NGC 1235 is often identified as a duplicate listing for NGC 1233; but as noted by Corwin, Swift recorded his observation on a night when he made a dozen other discoveries, almost all of which have excellent positions. So though it is possible that NGC 1235 and 1233 are the same, it is by no means certain, and what Swift actually observed may never be known.

Historical Identification: Per Dreyer, NGC 1236 (= GC 5300, Marth #88, 1860 RA 03 03 52, NPD 79 44) is "extremely faint, very small, round".
Physical Information: Apparent size of about 0.9 by 0.55 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1237 (Muller list II (#363), 1860 RA 03 03 56, NPD 99 12.0) is "very faint, small, extended 170°, perhaps a double star". The position precesses to RA 03 10 44.8, Dec -08 40 00, and although there are no nebulae anywhere nearby, there is a double star 9 arcmin west-southwest that exactly fits the description, so it is presumed to be Muller's object, and its position is the one listed above. LEDA lists NGC 1237 as PGC 5067669 (and as a double star), but a search of the database for that designation returns no result.

Historical Identification: Per Dreyer, NGC 1238 (Swift list V (#52), 1860 RA 03 04 18, NPD 101 16.5) is "very faint, pretty small, round, II 900 to northeast", (WH) II 900 being NGC 1247.
Physical Information: Apparent size 1.6 by 1.2 arcmin?

Historical Identification: Per Dreyer, NGC 1239 (= GC 652 = JH 288 = WH III 262, 1860 RA 03 04 20, NPD 93 05.0) is "extremely faint, stellar (RA +30 seconds of time?)", the last note suggesting that perhaps the object was actually at 1860 RA 03 04 50.
Physical Information: Apparent size 1.2 by 0.6 arcmin??

Historical Identification: Per Dreyer, NGC 1240 (= GC 653 = WH III 164, 1860 RA 03 04 23, NPD 59 57.7) is "extremely faint, very small, perhaps very small (faint) star?". The position precesses to RA 03 12 53.4, Dec +30 34 06, but there is nothing just like the description near that position. However, per Corwin, Dreyer's 1912 discussion of Herschel's catalogs includes Herschel's more complete record "Suspected, 240 (power) left a doubt; extremely faint and very small, most probably 2 close stars; between 2 stars". Given that, Corwin suggests that the object that best fits the bill is the double star at the position listed above, which is about 7 arcmin southeast of the NGC position. Whether that suggestion is correct or some other object in the region is what Herschel observed is probably irrelevant to those who think of the NGC as a list of clusters and nebulae, so it seems as good a suggestion as any. LEDA lists NGC 1240 as PGC 5067578 (and as a pair of stars), but a search of the database for that designation returns no result.

Historical Identification: Per Dreyer, NGC 1241 (= GC 654 = JH 289 = JH 2510 = WH II 286, 1860 RA 03 04 27, NPD 99 27.5) is "faint, pretty large, round, very gradually a little brighter middle, 9th magnitude star to north".
Physical Information: Apparent size 3.4 by 1.6 arcmin? Probably a physical pair with NGC 1242, with which it comprises Arp 304. Used by the de Vaucouleurs Atlas of Galaxies as an example of galaxy type SAB(rs)b.

Historical Identification: Per Dreyer, NGC 1242 (= GC 655 = WH III 591, 3rd Lord Rosse, 1860 RA 03 04 31, NPD 99 26.4) is "very faint, small".
Discovery Notes: Although Dreyer partially 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 Bindon Stoney.
Physical Information: Apparent size 1.2 by 0.6 arcmin? Probably a physical pair with NGC 1241, with which it comprises Arp 304.

Historical Identification: Per Dreyer, NGC 1243 (= GC 656 = JH 291 = JH 2511, 1860 RA 03 04 36, NPD 99 29.2) is "faint, very small, round". The position precesses to RA 03 11 24.0, Dec -08 57 18, about 2/3 of an arcmin southwest of a pair of stars to the southeast of NGC 1241 (which see for an image). The identity of the stars as NGC 1243 is certain, as much from their observational history as from the accuracy of JH's measurement. As noted by Corwin, William Herschel observed both NGC 1241 and 1242, but his son John never saw the fainter galaxy to its northeast; however, he did see the faint pair of stars to NGC 1241's southeast, and measured their position. When Dreyer observed all three objects with Lord Rosse's 72-inch telescope in 1877, their existence and relative positions were confirmed (although as shown by the NGC description, Dreyer also thought NGC 1243 was nebulous). LEDA lists NGC 1243 as PGC 5067579 (and as a pair of stars), but a search of the database for that designation returns no result.

Historical Identification: Per Dreyer, NGC 1244 (= GC 657 = JH 2512, Dunlop 205??, 1860 RA 03 04 42, NPD 157 18.8) is "faint, small, pretty much extended, gradually brighter middle".
Physical Information: Apparent size 2.1 by 0.4 arcmin??

Historical Identification: Per Dreyer, NGC 1245 (= GC 658 = JH 290 = WH VI 25, 1860 RA 03 05 06, NPD 43 17.4) is a "cluster, pretty large, rich, compressed, irregularly round, stars from 12th to 15th magnitude". LEDA lists NGC 1245 as PGC 3517883 (and as a cluster), but a search of the database for that designation returns no result.
Physical Information: Apparent size 10 arcmin?

Historical Identification: Per Dreyer, NGC 1246 (= GC 659 = JH 2513, 1860 RA 03 05 18, NPD 157 29.2) is "pretty faint, small, round, gradually a little brighter middle".
Physical Information: Apparent size of about 1.7 by 1.0 arcmin (from the image below). The sudden transition from the bright central core to much fainter outer regions suggests that the core may be the site of unusual activity, hence the addition of "peculiar" to its classification.

Historical Identification: Per Dreyer, NGC 1247 (= GC 660 = WH II 900, 1860 RA 03 05 39, NPD 101 00.1) is "faint, pretty large, extended 80°".
Physical Information: Apparent size 3.4 by 0.5 arcmin?

Historical Identification: Per Dreyer, NGC 1248 (= GC 661 = JH 292 = WH III 443, 1860 RA 03 05 50, NPD 95 45.1) is "considerably faint, small, a little extended, brighter middle, 9th magnitude star 5 arcmin to north".
Physical Information: Apparent size of about 1.3 by 1.15 arcmin (from the images below).

Historical Identification: Per Dreyer, NGC 1249 (= GC 662 = JH 2514, 1860 RA 03 05 58, NPD 143 52.3) is "bright, large, very much extended 80°, very gradually brighter middle".
Physical Information: Apparent size 5.5 by 2.5 arcmin?