Berkeley 12 (Lund 138, OCL 412) Open Cluster in Perseus

Located at: RA 04 hours 44 minutes 24 seconds, Dec +42 degrees 41 minutes 30 seconds

Size: 6.0' (4.0') Magnitude: -- Class: II 1 m

North is up

West to the right


 14.5" f5 Newtonian reflector


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


Lumicon Red filter, 600 minutes (60 x 10 minute subs), 11/25/27/29/2017; seeing 2.3-5.8 FWHM per CCDStack

Processing: CCDStack 2.94.6355.18107, Photoshop CS5.1

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

Notes: Still having bouts of high clouds (no rain) ... This object was again imaged though a night of high clouds, and one night of mostly clear skies, and some poor seeing. Also, the brightening moon lit up the high clouds, making the background tough to process.

According to  "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is listed as 4.0 arc minutes.