M 109 (NGC 3992) Galaxy in Ursa Major

Located at: RA 11 hours 57 minutes 36 seconds, Dec +53 degrees 22 minutes 29 seconds

Size: 7.6' x 4.6' Magnitude: 10.6 blue Class: SB(rs)bc HII

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, 720 minutes (72 x 10 minute subs), 04/6/7/8/9/2013; seeing 3.2-5.8 FWHM per CCDStack

Processing:

CCDStack 2.67.4842.27736, Photoshop CS5.1

Location:

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

Notes:

Unfortunately, the seeing was not too good during two nights for this re-shoot of M 109, courtesy of the off-shore winds ... see the 8" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 3992

NGC 3992 = M109 = U06937 = MCG +09-20-044 = CGCG 269-023 = PGC 37617
11 57 35.9 +53 22 29
V = 9.8;  Size 7.6x4.7;  SB = 13.6;  PA = 68d

17.5": bright, large, elongated 5:3 SW-NE, at least 6.0'x3.5', broadly 
concentrated halo, large faint halo.  A mag 13 star is superimposed on the halo 
50" NNW of center.  A mag 13 star is at the NE edge of the halo 3.4' from 
center.  Located 5.1' NE of mag 9.3 SAO 28199.  Forms a pair with U06923 15' 
SSW.

13": fairly bright, large, elongated SW-NE, bright core, diffuse halo.  A star 
is superimposed NW of the core.

- by Steve Gottlieb