NGC 2237 / NGC 2238 / NGC 2246 (Sh2-275, LBN 949)

NGC 2244 (Cr 99) (part of 'Rosette Nebula')

Bright Nebula / Open Cluster in Monoceros

Centered at: RA 06 hours 31 minutes 39 seconds, Dec +05 degrees 01 seconds 42 seconds

Size: 80; x 60' / 23'; Magnitude: -- / 4.8; Class: (Sharpless) 1 2 3 / II 3 r n (nebulosity = Rosette)

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

  ST-8XME, self-guided, binned 1x1, temp -25c & -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 680 minutes (68 x 10 minute subs), 03/12/13/16/17/2009; seeing 1.8-3.2 FWHM per CCDStack

Processing:

CCDStack 1.5.2.1, Photoshop 7.0

Location:

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

Notes:

This image replaces a red filtered 120 minute Track & Accumulate image from 03/21/2006. The image is centered on the 'hole' of the much larger 'Rosette Nebula'. The center of the open cluster is approximately at the brightest star near the lower left of this image. The Rosette Nebula (NGC 2237 / NGC 2238) is approximately 80' x 60' in size, and parts of it carry numerous designations. See here for my 14.5" Newtonian Tech Pan image of this area. See here for Robert Gendler's stunning 'megamosaic' of the Rosette Nebula