Telescope:

 8" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Deep Sky filter, 150 minutes (15 x 10 minutes subs), 11/16/2007

Processing:

CCDStack 1.3, Photoshop 7.0

Location:

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

Notes:

This images replaces a 60 minute (60 x 60 seconds) Track & Accumulate image from 12/03/2005.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 3.0 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 637

NGC 0637 = Cr 17 = OCL-329 = Lund 51
01 43 03 +64 02.2
V = 8.2;  Size 4

13.1": rich cluster of two dozen stars arranged in an arc.  There are five 
bright stars including a mag 10/11.2 double star at 9" separation.

8": 10 stars in cluster includes four mag 10 stars and fainter, mottled, over 
haze.

- by Steve Gottlieb