NGC 2128 (06h 04.6m +57 38') Discovered by Swift (VI). Not found by Bigourdan. Listed as a dubious object by Hagen. Swft's dec is 29' N of U03392 = M+10-09-010 = CGCG 284-006. Malcolm Thompson feels this difference in declination precludes accepting this gx as N2128. See Catalogue Corrections. Since Swift's position are known to be inaccurate, I've left this ID as acceptable (possibly misread dec circle by 30'). NGC 2253 (06h 43.7m +65 12') Described by WH (VII 54) as "a vF patch or S. Cl of eS st." There is nothing at WH's recomputed position of 06 41 52 +65 50.3 (J2000). Bigourdan failed to find this object. RNGC and CGCG identify N2253 = M+11-09-007 = CGCG 308-037 at 06 43 14.7 +65 40 39 (2000). A more likely possibility noted by Harold Corwin is N2253 = U03511= M+11-09-008, CGCG 308-038 (brightest in area) at 06 43 42.0 +65 12 23 (2000) although both positions are off in RA and dec. Finally, N2253 may be "a small group of about 10 - 15 stars" (identification suggest by Harold Corwin) at a rough position of 06 42.5 +66 19 (2000). This clump is located 30' N of WH's position. NGC 2278 (06h 47.3m +33 34') Discovered by d'A. The NGC position is 1.0 tmin E of N2274 and 10' S, so the equivalence N2278 = N2274 is uncertain. Nearby N2277 from d'A is not found. Reinmuth describes "vF, eS, R, bM, identification doubtful." NGC 2279 (06h 47.3m +33 36') Discovered by Bigourdan (described as a star + neb?). The NGC position is 1.0 tmin E of N2275 and 11' S so the equivalence with N2275 is very uncertain. Oddly, d'Arrest's position for N2278 has a similar offset from N2274. NGC 2330 (07h 09.5m +50 09') In the three Lord Rosse observations of the N2332/N2340 field a total of 9 objects were found and sketched. For some reason the only additional object that Dreyer decided to include in the NGC was N2330. Swift and Kobold later surveyed the field, and Dreyer included accurate positions for all of Rosse's objects shown on the sketches in the IC. Since Rosse did not provide positions, Dreyer probably had to rely on the sketch The NGC position for N2330 is incorrectly given as 2.4' N of the larger and brighter N2332. Reinmuth notes "in Dreyer's place not found." It appears that this error originated from one of the Rosse sketches which incorrectly placed N2330 north of N2332 instead of southwest. N2330 was then properly sketched at a later observation and recatalogued by Dreyer as IC 457. Therefore, it is fairly certain that N2330 is identical to IC457. The 1950 positions for these galaxies are: N2330 07 05 37.9 +50 13 59 =IC 457 = M+08-13-078 = Z234-074 N2332 07 05 43.7 +50 15 46 =U03699 = M+08-13-079 = Z234-075 The identifications and positions given in the RNGC are (R)N2330 07 05.7 +50 16 E, R, BM, DKLNSUSP (R)N2332 07 05.7 +50 15 E, R, BM, ALMSTEL Based on the RNGC declinations it is clear the RNGC has reversed the identifications of N2330 and N2332 making N2330 the brighter northern member of the pair and incorrectly describing N2332 as "almstel" (same error in MCG). So, the data for N2330 and N2332 should be reversed in the RNGC. This gx is identified as IC 457 in UGC and CGCG. See RNGC Corrections #5. In the IC 1 notes, Dreyer mentions that Kobold did not find N2330 or N2334 (see AN #3184), in his table on the N2332 group. Not listed in RC3. NGC 2334 (07h 11.6m +50 15') Discovered by Bigourdan and at Birr Castle. Poor position in NGC and Reinmuth states "in Dreyer's place not found, = IC 464? Kobold's position for IC 465 from AN 3184 is an exact match with M+08-13-098 and this gx is definitely shown on the Birr Castle sketch of the cluster. The question remains if this is the NGC object. Harold Corwin feels it is probable. Listed as nonexistent in RNGC. NGC 2347 (07h 16.1m +64 43') Discovered by WH (III 746). His original discovery position (with respect to his reference star) is 07 16 44 +65 00.7 (2000). In the GC, JH modified his father's position to 07 16 19 +64 48.2 (2000) although he did not reobserve this gx. This latter position is 16s E and 6' N (or 9' NE) of U03759 = M+11-09-039. Bigourdan later observed this field in 1894 and 1900. His original position for B267 = IC 2179 in Comptes Rendus is 07 15 33 +64 57 (2000) which is an excellent match for U03750 = M+11-09-038a at GSC position 07 15 32.2 +64 55 34 (2000). CGCG, UGC, MOL, DSFG, RC3, PGC and U2000 all identify as IC 2179. His listing in the complete Observations, etc. for B267 gives a position of 07 16 06.2 +64 43 01 (2000), which matches U03759, the galaxy identified as N2347 in modern catalogues and his listing for N2347 matches U03750 (HC notes an error in his identification of the reference star). So, apparently Bigourdan has reversed the identifications here. Based on his original position it is possible that WH's original observation refers to U03750 instead (as Bigourdan claimed). NGC 2361 (07h 18.4m -13 13') Discovered by Bigourdan. Howe notes that this number is probably identical to N2359 (or a small condensation in 2359) although Harold Corwin notes that it is possibly a double star. There are close pairs on the GSC 3' and 4' NW of the NGC position. NGC 2433 (07h 42.7m +09 15') Discovered by JH (h462) and described as "eF, has a *15 90" dist 30 deg np." At h's position on the GSC (07 42 43.5 +09 15 33) is a nonstellar object and Harold Corwin lists N2433 as a triple star. This object is very close to h's original position of 07 42 43.3 +09 15 40 so the ID appears very likely. The DSS reveals the merged image of an apparent triple star. RNGC identifies N2433 = CGCG 058-029 although this gx is listed as anonymous in CGCG. h's position is a reasonable match to this gx (0.3 tmin W and 3' S). Also observed by d'A according to NGC notes section (with a different RA) and Dreyer notes that h's RA is correct in the IC 1 notes. Not listed in UGC, MCG, RC3. ID uncertain. NGC 2472 (07h 58.7m +56 42') Discovered by Rosse and simply described as one of 10 knots. Not seen by Bigourdan. M+10-12-039 is not identified as N2472 and the MCG RA is 0.2 tmin further E of CGCG and RNGC positions. The NGC position is 0.3 tmin further W and 3' N of M+10-12-039, so identification is not certain. Not listed in RC3. NGC 2473 (07h 55.6m +56 44') Described by Rosse as one of 10 "knots" in a line. Not seen by Bigourdan although Harold Corwin notes this is one of the 6 brightest gx's in the field so was probably seen by Rosse. Harold Corwin proposes using this number to identify a gx at 07 55 34.9 +56 44 09 (2000) which is identified in RNGC as N2458. Unfortunately, this would place this object out of RA order. NGC 2586 (08h 24.5m -04 56') Discovered by Muller (II). There is a triple star at the NGC position on the POSS although the other members of this group were placed 1.0 tmin too far E by Muller. RNGC misidentifies this number with a faint galaxy. Confirmed by Harold Corwin. NGC 2597 (08h 30.0m +21 29') N2597 and N2598 are both Marth entries with very similar coordinates (N2597 is 5s W = 1.2 arcmin). UGC identifies N2598 = N2597. It is possible that Marth thought this galaxy was double but the galaxy is elongated N-S, not E-W as his position would indicate. The DSS shows one or two very faint stars about 1' NW, which are more likely N2597. Not found by Reinmuth or Carlson. NGC 2602 (08h 35.1m +52 50') Discovered by JH (h508). His mean position from two observations 08 35 01.4 +52 50 10 (2000) is a near perfect match with M+09-14-069 = Z263-056 at 08 35 04.2 +52 49 54. The mag 14 star 4' WNW (PA -96d) is probably the star JH refers to as "about 5d np a star". Observation verified on POSS. On the Birr Castle sketch of the field N2602 is apparently labelled Gamma but it appears that Dreyer assumued it was Alpha. Although Dreyer used h's correct position, he placed N2603 and N2605 following, although the two nova shown on the sketch are probably Alpha and Beta and so precede N2602. Assuming h508 = N2602 = Rosse's Gamma, this gx is correctly identified in MCG and PGC. NGCPOS identifes Rosse's Alpha = N2602 and Gamma = N2605 (using the natural order in the sky). N2602 is not listed in RC3. NGC 2603 (08h 34.5m +52 50') Discovered at Birr Castle. This is a very confusing situation because Dreyer apparently assumed alpha = N2602 instead of gamma = N2602. Because of this he assigned identities for the two nova as N2603 (assuming it was beta) and N2605 (assuming it was gamma) and so placed them following N2602 (which does have accurate coordinates from h 508). If the two Rosse nova are alpha and beta, I would suggest N2603 = alpha and N2605 = beta although these would now precede N2602 in the sky. Harold Corwin measured the position of alpha as 08 34 28 +52 50.2 To further confuse the situation, the Birr Castle observation from 5 March 1867 states "2 neb. seen nearly pf, p one eeF, f on eF. Measures extremely difficult. Pos 92 (2), Dist 118" (1)." The galaxy identified as N2603 in RNGC is located 117" preceding N2606 at 08 35 21.5 +52 47 35. And with respect to this extremely faint and small galaxy (it is shown on the GSC chart as a mag 15.3 star), the PA of N2606 is 97, also a good match. I did not pick up this galaxy in my observation but it is apparently shown on the Rosse sketch as a star just below (west of ) delta = N2606. If the Rosse observers did see this object as nonstellar on 5 March 1867, I don't believe it received a NGC number as Dreyer probably did not know which two objects in the group this observation referred to. The MCG entry for N2603 (+09-14-072) probably applies to much brighter N2606 2' E since there is no other nearby entry. DSFG equates N2603 = N2606. N2603 was not found by Bigourdan. NGC 2605 (08h 34.9m +52 48') Discovered by LdR. See his sketch of the field on 11 March 1858 and discussion under N2603. I suggest that N2605 = Rosse's beta (one of two novae) at 08 34 51 +52 48.3 (from Harold Corwin). Harold Corwin identifies N2605 as M+09-14-069 = CGCG 263-056 but this galaxy is h508 = N2602 at precisely h's position. N2605 is listed as nonexistent in RNGC and not in any modern catalogue. N2605 was not found by Bigourdan. NGC 2630 (08h 45.5m +73 01') Discovered by Tempel (IX) along with N2631. N2630 is identified in the RNGC as U04547. On the POSS this is an extremely thin faint edge-on 7' WNW of N2629. This gx is not identified as N2630 in UGC (U04547) or CGCG (331-061) and is incorrectly identified as N2629 in MCG (whose identification is certain). The original description for N2630/31 from Tempel (AN #2660) refers to "two new fine nebula very close to N2629" and mentions that "my two new nebulae are much brighter than those found by D'Arrest [N2614] and William Herschel [N2629/2641]. Dreyer only gave an approximate position near N2629. The RNGC identification is unlikely due to the extreme faintness of its candidate. U04547 = N2630? is not listed in RC3. The PGC correction paper identifies U04547 as N2630 = N2631. Malcolm Thompson concurs that the RNGC ID is very unlikely. Discussed in several letters with HC who suggests that Tempel may have confused the ID's and that N2630 and N2631 might be identical to N2634 and N2634A (although the latter is much fainter). NGC 2631 (08h 47.1m +73 00') Discovered by Tempel as a pair with N2630 near N2629. Listed as nonexistent in RNGC and not in RC3. MCG lists M+12-09-010 as N2630 = N2631 and M+12-09-009 = U04547 = (R)N2630 as N2629. This appears incorrect as N2630/31 are described by Tempel as "nr N2629". See discussion under N2630. Harold Corwin proposes N2630/31 might by a duplicate observation of N2634 and N2634A. NGC 2637 (08h 41.1m +19 43') Marth's position is 0.2 tmin .E and 9' S of Z089-065. .This gx is not identified as N2637 in CGCG. Marth's position is roughly 10' SSE which is a relatively large error for him but is a similar offset as N2643 = IC 2390? Z089-065 is not listed in RC3 or MCG. Possible GSC position 08 41 07.9 +19 42 39 (listed as stellar). NGC 2674 (08h 48.2m -14 17') Discovered by Stone (I). Harold Corwin notes that the ID is uncertain, but N2674 possibly refers to the galaxy at 08 49 13 -14 17.7 (2000). This position is 1.2 tmin E of Stone's position and matches in dec. Not found by Howe on 2 nights. Not listed in DSFG. Listed as uncertain NGC ID in ESGC. NGC 2757 (09h 05.4m -19 03') Discovered by Muller (II). Described as only an eF D*, dist 12" by Howe. Harold Corwin proposes a closer triple star (Muller would have resolved the coarser double) at 09 05 25.7 -19 02 52 (2000). NGC 2786 (09h 13.6m +12 26') Discovered by Marth and placed at 09 13 55 +12 08.5 (2000). Reinmuth states "in Dreyer's place not found" but identifies a gx at 09 13 36 +12 26.4 (2000) which is 18' N of Marth's position. NGCPOS also gives the same identification with the comment "NGC pos bad, but desc fits." Listed as nonexistent in RNGC (from Carlson's list). Identification uncertain. NGC 2816 (09h 21.1m +60 27') Discovered by JH (h579) and described as "F, pmE". Not found by Bigourdan "not found at Dreyer's place" by Reinmuth. This is repeated by Carlson and listed as nonexistent in RNGC. NGC 2829 (09h 19.5m +33 39') Discovered by LdR. The NGC RA is 0.2 tmin E of an extremely faint and small galaxy 2' NE of N2829 . This gx is described by Reinmuth as "identification doubtful, vF, vS, R, vgvlbM, triangle with 2 st nf and f, N2826 sp 2.1'." This gx is not listed in CGCG, MCG, RC3 or GSC and appears unusually faint on Vickers' CCD Atlas. It forms a close double with a mag 16? star. Rosse's sketch is a reasonable match in relative position although there are no sketched stars to confirm ID. NGC 2901 (09h 32.4m +31 07') Discovered by Stone (I). No description given and with his very rough position not listed in any modern catalogue. Not found by Hagen in Zone Catalogue and not found by Bigourdan. Listed as nonexistent in RNGC. Skiff identifies this object as a double star with brightest component GSC 2494-0616 at 09 32 19 +31 07.1 (2000). NGC 2909 (09h 37.0m +65 56') Discovered by JH (h605). There is a mag 14.5 GSC star at h's place 09 36 59.4 +65 56 19 (2000). This star is a close double on the DSS. This would appear to be the logical candidate for N2909 although there is another closer fainter double 1' NW. Reinmuth has "vF, S, E, r; *13.5 nf 0.7'.", but there is no *13.5 nf 0.7' either double star. Incorrectly identified in RNGC and CGCG as N2909 = CGCG 312-021. JH's position is over 40' W of this galaxy. NGC 2912 (09h 33.9m +10 09') Discovered by Herman Schultz in his observation of N2911 and described as "follows h608 [N2911] some seconds about 2' N; but not observable". I'm not sure of the meaning of his last comment but 1.3' ENE of N2911 is an extremely faint and small, low surface brightness galaxy at 09 33 51.2 +10 09 30 (2000). A mag 14-15 star is 35" E. This gx is not listed in any of the modern catalogue except RNGC and based on its appearance on the POSS, I feel the ID is uncertain although this object does match Schultz's location. I missed detecting his galaxy in my 17.5" while viewing N2911 and it was not found by Bigourdan. Reinmuth gives an doubtful ID 1.9' ENE of N2911 (unsure if this refers to the same gx mentioned above). Listed in RC3 with approximate coordinates. Listed in RNGC Corrections #3 because the RNGC gives identical coordinates as N2911. NGC 2952 (09h 37.6m -10 12') Muller's position in list II is 2.0 tmin too far E and 3' N. This galaxy is very faint and not found by Bigourdan, so identification is uncertain according to Harold Corwin. Listed as nonexistent in RNGC and not in RC3 or DSFG. NGC 2982 (09h 42.2m -44 02') Discovered by JH (h3184): "a cluster of about 20* 11m, and 2 of 10m, forming an oblong nearly in parallel; place of preceding *10m". His position is 09 42 16.5 -44 44 34 (2000) but there is no bright nearby on GSC. JH changed the dec 30' further N when he entered this object as GC 1910 (repeated by Dreyer in NGC) but this position does not correspond with any clustering. But an additional 10' N of the GC/NGC position is a group of brighter stars fitting h's description and his RA matches the SW member of a wide pair of mag 10 stars at the SE side of the group. ESO gives a position of 09 42 03 -44 00.8 (2000). Misprint in MCG equates M+05-28-059 = N2982. Listed as nonexistent in RNGC. It is also possble that this group corresponds with Ru 80 = OCL-770 = Lund 516 at the Lynga position 09 42.3 -44 02 (2000) but Skiff disagrees: "[Ru 80] is indeed a very small and much fainter cluster off to the east side of NGC 2982." Lynga does not give a separate listing for N2982. NGC 2999 (09H 40.3M -50 19') Discovered by JH (h3192) and possibly Dunlop (D 397). Described by h as "a small irreg cl of a long trianglular diverging figure; contains perhaps 50 stars 12...15m. Observed for 397, and place only rough. Possibly the same object with D 397 = N2972." Although there is a 5 tmin difference in h's rough RA for N2972, Archinal suggests N2972 = N2999. |
 |