NGC 1961 (IC 2133, UGC 3334) group of Galaxies in Camelopardalis
Center of field at approximately: RA 05 hours 43 minutes 58 seconds, Dec +69 degrees 17 minutes 40 seconds
NGC 1961 = Size: 4.5' x 2.9'; Magnitude: 11.7 blue; Class: SAB(rs)c
North is up
West to the right
| Telescope: |
8" f5 Newtonian reflector |
| Camera: |
ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56 |
| Image: |
Lumicon Red filter, 970 minutes (97 x 10 minute subs), 01/6/7/9/12/13/2012; seeing 2.3-4.8 FWHM per CCDStack |
| Processing: |
CCDStack 2.55.4392.26193, Photoshop CS 5.1 |
| Location: |
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s) |
| Notes: | NGC 1961 is the obvious galaxy to the Northwest (upper right) ...
other galaxies are UGC 3342 (1.7'x0.3',
15.2p mag, Cl:Scd:) and UGC 3344 (2.4'x1.5',
14.2p mag, Cl:SABbc), and UGC 3349 (1.0'x0.6',
14.4p mag, Cl:Sab) from West to East (right to left). See this
image of named objects from
Megastar v5.0.13.
Contemporary Visual Observation(s) for
NGC 1961NGC 1961 = UGC 03334 = MCG +12-06-007 = CGCG 329-008 = Arp 184 = IC 2133 = PGC 17625 05 42 04.4 +69 22 46 V = 11.0; Size 4.6x3.0; SB = 13.7; PA = 85d 17.5" (12/8/90): moderately bright, moderately large, elongated 2:1 E-W, weak concentration, small bright core. A mag 13 star is 30" SSE of center and a mag 12 star is just off the W edge 2.4' from center. Appears to have a dark patch between this star and the core. Forms a pair with CGCG 329-011 7.6' NE (not seen). 8" (10/13/81): faint, moderately large, bright core, diffuse, elongated, star involved. Discovered by WH (III 747). There was an erroneous reduction of Herschel's position in NGC (noted by Dreyer in 1912 NGC Correction list). The correct position for this galaxy (U03334 = M+12-06-007 = Arp 184) was later given by Bigourdan and received the number IC 2133. - by Steve GottliebHistorical Research Notes / Correction for NGC 1961 The place of H III - 747 is wrong, it is = IC 2133. - J.L.E. Dreyer (Royal Astronomical Society Notices; 73 - 37 (1912) - Robert E. Erdmann, Jr. ================================================================= IC 2133 = NGC 1961. Here is one of the objects that forces me to ask the question "What was Bigourdan thinking?" He measured it twelve times on three nights, could not find NGC 1961 when he looked for it on one of those nights, and must have been aware that WH's positions were subject to large accidental errors. So, how could Bigourdan believe that his "Big. 385" was a new object and not the one that WH found? Well, he obviously did because the object ended up in the 2nd IC. Dreyer discovered the identity a few years later when he prepared WH's Scientific Papers for publication. There is no doubt about the identity, either. So, "What was Bigourdan thinking?" (Obviously, a rhetorical question.) Also see NGC 1961 for the story of WH's mistaken position. - Dr. Harold G. Corwin, Jr. |
