NGC 2236 (Lund 221, Cr 94) Open Cluster in Monoceros

Located at: RA 06 hours 29 minutes 40 seconds, Dec +06 degrees 49 minutes 48 seconds

Size: 6.0' (8.0') Magnitude: 8.5 Class: II 2 m

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, 200 minutes  (20 x 10 minute subs) 02/2/2010; seeing 2.8-3.3 FWHM per CCDStack

Processing:

CCDStack 1.6.1, Photoshop 7.0

Location:

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

Notes: According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 8.0 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 2236

NGC 2236 = Cr 94 = OCL-501 = Lund 221
06 29 40 +06 49.8
V = 8.5;  Size 7

13.1": two dozen faint stars in a 5' region over background haze.  The brighter 
stars are in a rich 1' triangular outline with the brightest mag 11 star in the 
cluster.  A long curving arc of fainter stars emanates from the group.  Fairly 
striking cluster.

- by Steve Gottlieb