King 15 (Lund 20, OCL 298) Open Cluster in Cassiopeia

Located at: RA 00 hours 32 minutes 01 seconds, Dec +61 degrees 51 minutes 12 seconds*

Size: 1.5' (3.0) Magnitude: -- Class: IV 2 p

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, 400 minutes (40 x 10 minute subs), 09/6/7/2017; seeing 2.5-4.1 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)


As with Sh2-157, I moved to the northern skies to escape the brightening moon in the east/southeast.

* My software (Megastar v5.0.14) lists the center of this open cluster as the bright star centered; the CDS has the center at 00h 32m 47.1s; 61d 53m 24s. This is about 3.1 minutes NNW (upper right) of the centered star.

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

See the CDS image/data (for position).