NGC 884 (Lund 76, Cr 25) Open Cluster* in Perseus

Located at: RA 02 hours 22 minutes 20 seconds, Dec +57 degrees 08 minutes 00 seconds

Size: 29' (18') Magnitude: 6.1 Class: I 3 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:

Lumicon Red filter, 610 minutes (61 x 10 minute subs), 10/28/29/2011; seeing 2.5-3.5 FWHM per CCDStack

Processing:

CCDStack 2.24.4110.20701, Photoshop CS 5.1

Location:

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

Notes:* This is the eastern half of the the "Double Cluster". This image of the "Double Cluster" is centered between the two clusters.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 18 arc minutes.

From the NGC / IC Project:

NGC 0884 = Chi Per = Cr 25 = Double cluster
02 22 32 +57 08.6
V = 3.6;  Size 30

17.5": the following group of the remarkable field of the "double cluster" is
not as large or bright as N869, but is centered around two wide triple stars. 
The central 5' has up to 50 stars including a number of faint mag 14-15 stars
forming a rich background.  Off the W end of the central region is a long string
of stars which heads NE for 10' towards 3 brighter stars and then turning S and
heading back past a mag 8 orange-red RS Persei.  The 20' field includes ~200
stars, although the field does include as many bright stars or as compressed as
N869.

8": this is the eastern component of the "double cluster".  Very bright, large,
very rich, ~20' diameter, ~60 stars, includes bright colored stars, many
doubles.

- by Steve Gottlieb