NGC 2254 (Lund 234, Cr 103) Open Cluster in Monoceros

Located at: RA 06 hours 45 minutes 37 seconds, Dec +07 degrees 40 minutes 07 seconds

Size: 4.0' (6.0') Magnitude: 9.1 Class: I 1 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:

Red (Hoya 25A) filter, 120 minutes (12 x 10 minute subs), 03/28/2007

Processing:

CCDStack 1.1, Photoshop 7.0

Location:

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

Notes:

This little open cluster lies in an often imaged area of Monoceros ... about two thirds of the distance from the 'Rosette' nebula to the 'Cone' nebula. This entire area is wreathed in faint nebulosity, some of which is very faintly shown to the southeast (lower left) in this image.

According to "Star Clusters", by Brent Archinal and Steven Hynes, the size of this open cluster is 6.0 arc minutes.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 2254

NGC 2254 = Cr 103 = OCL-500 = Lund 234
06 35 50 +07 40.4
V = 9.7;  Size 4

17.5": at 220x, about two dozen stars over haze in a 3'-4' diameter.  About 6 
stars of mag 13 form a "C" shaped asterism open on the E side.  The brightest 
mag 13 star is on the NW side of this arc.  The rest of cluster members are 14-
15th magnitude.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 2254
NGC 2254.  The NGC RA for this cluster is 10 seconds of time too far west.  
While that may be an error in reduction of WH's or JH's observations, it could
also simply be a statistical fluke. - Dr. Harold G. Corwin, Jr.