NGC 4236 (UGC 7360) Galaxy in Draco

Located at: RA 12 hours 16 minutes 43 seconds, Dec +69 degrees 27 minutes 47 seconds

Size: 22' x 7.2' Magnitude: 10.1 blue Class: SB(s)dm

North is up

West to the right


 14.5" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56


Lumicon Red filter, 590 minutes (59 x 10 minute subs), 03/27/31 & 04/1/2/2015; seeing 2.1-4.4 FWHM per CCDStack


CCDStack 2.89.5560.25580, Photoshop CS5.1


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

Notes: As the moon moved into the southern skies, I stayed in the north, imaging NGC 4236 after NGC 5389/5379. Unfortunately, I should have imaged this earlier this year under a no moon sky, as I could only get 15 or so subs before this object 'set' into the 'occulting' branch to my north. Also, NGC 4236 is oriented north-south, and is larger than my vertical field of view (about 15 arc minutes).

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 4236
NGC 4236 = UGC 07306 = MCG +12-12-004 = CGCG 335-008 = PGC 39346
12 16 43.5 +69 27 34
V = 9.6;  Size 21.9x7.2;  SB = 15.0;  PA = 162d

17.5": faint, extremely large, edge-on 5:1 NNW-SSE.  Appears as a ghostly streak 
about 20' length with only a broad, weak concentration!  Best at low power due 
to size and low surface brightness.

13": faint, very large, very elongated NNW-SSE, weak concentration.  In a field 
with five mag 8-9 stars.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 4236
NGC 4236.  While there is no question about the identification of this large, 
low surface brightness galaxy, its accurate position is not easily determined.
There is no nucleus visible at any wavelength, so the published positions are 
all either estimates, or refer to various other features within the galaxy.  
The position that I've adopted is an estimated center of the outer isophotes
visible on the POSS I prints.  Because the galaxy is reasonably symmetrical --
unlike many other late-type galaxies which also have no nucleus -- this 
position pretty closely corresponds to the center of the bar, and is within a
few arcsec of a superposed star. - Dr. Harold G. Corwin, Jr.