M 52 (NGC 7654, Lund 1034, Cr 455) Open Cluster in Cassiopeia

Located at: RA 23 hours 24 minutes 50 seconds, Dec +61 degrees 35 minutes 51 seconds

Size: 12' (16') Magnitude: 6.9 Class: II 2 r

North is up

West to the right


 14.5" f5 Newtonian reflector


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


 Lumicon Red filter, 400 minutes (40 x 10 minute subs), 09/10/11/2014; FWHM 2.6-3.8 per CCDStack


CCDStack 2.81.5337.19441, Photoshop CS5.1


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


As with PK 114-4.1, I imaged M 52 while waiting for the moon to clear the southern sky, so I could begin imaging planetaries in Aquila.

Another complex area of the sky containing a bevy of deep sky objects. Also imaged in this area is "The Bubble" (NGC 7635), NGC 7538 and NGC 7510. See the 8" version of M 52.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 16 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7654

NGC 7654 = M52
23 24 48 +61 35.6
V = 6.9;  Size 13

13.1" (9/29/84): 150-175 stars in a 15' diameter, beautiful, appears fully 
resolved.  Includes a few rich clumps near the center.  A mag 8 star is on the 
west side.  The "Bubble Nebula" N7635 lies 35' SW.

17.5" (8/2/86): fills 21' field, fully resolved at 105x.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 7654
NGC 7654 = M 52.  The NGC position (from JH) is for SAO 20606, west of the
cluster itself.  The cluster has a tight core of perhaps a dozen stars, but
this is not at the geometrical center of the cluster.  Hence, I've listed two
positions in the table.  Take whichever one seems appropriate to you.
 - Dr. Harold G. Corwin, Jr.