M 76 (NGC 650/651, PK 130-10.1) Planetary Nebula in Perseus
Located at: RA 01 hours 42 minutes 20 seconds, Dec +51 degrees 34 minutes 35 seconds
Size: 167" Magnitude: 12.2 photographic Class: 3+6
North is up
West to the right
8" f5 Newtonian reflector
ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56
Lumicon Deep Sky filter, 350 minutes (35 x 10 minute subs), 12/11/13/2007
CCDStack 1.3, Photoshop 7.0
Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)
See the 14.5" version.
From the NGC / IC Project:
Contemporary Visual Observation(s) for NGC 650
NGC 0650 = PK 130-10.1 = M76 = Little Dumbbell Nebula = PN G130.9-10.5 01 42 18.1 +51 34 16 V = 10.1; Size 163"x107" 17.5": bright, fairly large, consists of two prominent irregular lobes with a darker center; the SW lobe is brighter with straight edges while the NE lobe has a slightly curved edge. A mag 13.5 star is attached at the southern edge of the SW lobe. Extending from the main body of this striking bipolar planetary is a large halo which contains two large outer arms or wings similar to a spiral galaxy! The outer "arm" attached at the NE end is brighter and longer and curves to the west. The southern extension is short, fainter, and less defined. 13": SW end is brighter while the NE end is slightly curved. Boxy appearance with a dark center. - by Steve GottliebHistorical Research Notes / Correction for NGC 650
NGC 650 and NGC 651 together form M76. They are the two bright lobes of a bipolar planetary nebula. (The fainter, wispy loops to the northwest and southeast were most likely not seen well until M76 was photographed.) For GC and NGC, JH and Dreyer took the lobes as two separate nebulae, put the Messier number on N650, and the WH number (I 193) on N651. There is a little justification for this, but not very much. WH was the first to recognize that the nebula was apparently double. He says of it "Two close together. Both vB. dist. 2' sp nf. One is 76 of the Conn[oissance des Temps]." That, strictly speaking, is incorrect as neither Mechain nor Messier reported the nebula as double. Still, two NGC numbers it is for the single Messier number. This has happened at least once more. See NGC 5194 and NGC 5195, the two galaxies comprising M51 -- though for that, Messier did see the two separate objects. - Dr. Harold G. Corwin, Jr.