NGC 6791 (Berkeley 46, Lund 886) Open Cluster in Lyra

Located at: RA 19 hours 20 minutes 54 seconds, Dec +37 degrees 46 minutes 09 seconds

Size: 10' Magnitude: 9.5 Class: I 2 r

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

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

Image:

 Red (Hoya 25A) filter, 250 minutes (25 x 10 minute subs), 09/8/2006

Processing:

CCDStack 1.1, Photoshop 7.0

Location:

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

Notes:

This image replaces my August 2005 unfiltered 45 minute image (9 x 5 min subs). See the 14.5" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6791

NGC 6791 = Be 46 = Lund 886 = OCL-142
19 20 53 +37 46.3
V = 9.5;  Size 16

13.1": fairly faint, moderately large, many faint stars are resolved over haze 
with averted, low surface brightness.  This is one of the very oldest open 
clusters, along with Be 17, with an age of 9 to 11 Gyr!

8": moderately large, very faint hazy patch like a low surface brightness 
galaxy, no resolution.

- by Steve Gottlieb