Stock 3 (Lund 39, OCL-318) Open Cluster in Cassiopeia

Located at: RA 01 hours 12 minutes 03 seconds, Dec +62 degrees 16 minutes 24 seconds

Size: 2.0' (5.0') Magnitude: -- Class: IV 1 p

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

 Lumicon Red filter, 600 minutes (60 x 10 minute subs), 11/6/9/10/2010, FWHM 2.1-3.6 per CCDStack

Processing:

 CCDStack 2.14.3930.18957, Photoshop 7.0

Location:

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

Notes: This little cluster (centered) is not that interesting itself, but the two dark patches on either side made an interesting field. To the west (right), and fairly obvious, is TGU HJ838 P6 at about 5.0' in diameter, and to the east (left) is LDN 1312 at about 15' x 10' in size. Data from these two Dark Nebulae are from the CDS (neither were in my charting software, Megastar v5.0.12), found via the Aladin previewer (just type "Stock 3" in the 'Target' field, click on the hyperlinked "Stock 3", and set the "query around" field for 30 minutes).

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of Stock 3 is 5.0 arc minutes