NGC 7789 (Cr 460, Mel 245) Open Cluster in Cassiopeia

Located at: RA 23 hours 57 minutes 26 seconds, Dec +56 degrees 46 minutes 14 seconds

Size: 15' (25') Magnitude: 6.7 Class: II 2 r

North is up

West to the right

Telescope:

14.5" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -10c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 450 minutes (45 x 10 minute subs), 08/31 & 09/1/2014; seeing 2.7-4.1 FWHM per CCDStack

Processing:

CCDStack 2.81.5337.19441, Photoshop CS5.1

Location:

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

Notes:

This is a typical example of my trying to image every clear night ... NGC 7789 was rising in my northeast 'window', as the nearly full moon was dominating the southern sky. See the 8" version.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 25 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7789

NGC 7789 = Cr 460 = Lund 1053 = OCL-269
23 57 24 +56 42.5
V = 6.7;  Size 16

17.5" (10/12/85): few hundred stars resolved in a 20' field.  Remarkably rich 
and fairly uniform carpet of stars mag 11 and fainter.

8" (11/8/80): extremely rich, uniform in faint stars.  Certainly among the top 
open clusters with this aperture.

- by Steve Gottlieb