M 82 (NGC 3034, Arp 337) Galaxy in Ursa Major

Located at: RA 09 hours 55 minutes 53 seconds, Dec +69 degrees 40 minutes 57 seconds

Size: 11.3' x 4.2' Magnitude: 9.3 blue Class: I0 sp HII Sbrst

North is up

West to the right

Telescope:

14.5" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 250 minutes (50 x 5 minute {300 seconds} subs), 02/3/2013; seeing 3.4-4.2 FWHM per CCDStack

Processing:

 CCDStack 2.62.4434.29317, Photoshop CS5.1

Location

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes:

Finished M 82 after a week of clouds ... Decided to take 5 minutes subs, because the surface brightness of the central region is high. This earlier sequence of M 82 was taken in poor seeing. See the 8" version.

M 82 is located about 37 minutes north of M 81.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 3034

NGC 3034 = M82 = U05322 = MCG +12-10-011 = CGCG 333-008 = Arp 337 = PGC 28655
09 55 53.5 +69 40 54
V = 8.4;  Size 11.2x4.3;  SB = 12.5;  PA = 65d

17.5": very bright, large, edge-on 4:1 WSW-ENE, 10' x 2.5', large bright 
irregular core.  Very mottled with an unusually high surface brightness.  Unique 
appearance with several dark cuts oblique to the major axis including a 
prominent wedge or cut nearly through the center.  A mag 10 star is just south 
of the SW end 5.8' from the center

13": two obvious dark lanes.

8": bright, spindle, mottled.  A dark wedge cuts into the galaxy near the center 
from the south side.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 3034
NGC 3034 = M 82.  The position for this large, bright irregular galaxy depends
strongly on wavelength.  The brightest optical knot is not coincident with
the radio "nucleus" nor with the brightest infrared knot.  And there are 
several bright X-ray sources scattered throughout the galaxy.

All the positions I've listed, though, fall within the boundaries of the 
galaxy, and there is of course no identification problem (but note that this
is one of the few Messier objects which also received a number -- IV 79 -- in 
WH's catalogue). - Dr. Harold G. Corwin, Jr.