NGC 2266 (Lund 250, Cr 113) Open Cluster in Gemini

Located at: RA 06 hours 43 minutes 20 seconds, Dec +26 degrees 58 minutes 12 seconds

Size: 6.0' (5.0') Magnitude: 9.5 Class: II 2 m

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 180 minutes (18 x 10 minute subs), 01/25/2009; seeing 2.9 FWHM per CCDStack

Processing:

CCDStack 1.5.1, Photoshop 7.0

Location:

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

Notes:

This sequence replaces an unfiltered 90 minute Track & Accumulate image from 01/25/2006.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 5.0 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 2266

NGC 2266 = Cr 113 = Mel 50 = OCL-471
06 43 20 +26 58.2
Size 7

13.1": three dozen stars mag 9-15 in a 4' diameter.  Most members are very 
faint, appears quite rich with averted, over unresolved background haze.  The 
brightest star mag 8.6 SAO 78670 is at the SW edge of cluster and a string of 
five brighter stars mag 10-12 trail to the WNW.  An isolated mag 10 star is off 
the NW corner.

- by Steve Gottlieb