Czernik 4 (Lund 47) and Trumpler 1 (Lund 48) Open Clusters in Cassiopeia

Center of field at approximately: RA 01 hours 35 minutes 42 seconds, Dec +61 degrees 23 minutes 09 seconds

Size: 3.0' (4.0') and 4.5' (3.0') Magnitude: -- and 8.1 Class: IV 2 p and II 2 p

North is up

West to the right

Telescope:

8" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Red filter, 190 minutes (19 x 10 minute subs), 10/22/2008; seeing 2.6-3.5 FWHM per CCDStack

Processing:

CCDStack 1.3.7, Photoshop 7.0

Location:

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

Notes: Czernik 4 is a group of about 10 member stars centered on 8.56 (visual) magnitude HD 9583, centered at the top of the field. Trumpler 1 is the more obvious cluster of about 37 stars centered at the bottom.

 According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of Czernik 4 is 4.0 arc minutes, and the size of Trumpler 1 is 3.0 arc minutes