Instrument

12.5" RCOS @  ~f/9 (2880 mm fl) 0.643 arcsec / pixel.  Shown resampled to 1.70 arcsec / pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ internal filter wheel, AstroDon Filters

Acquisition Data

9/6/2009 to 9/15/2009  Chino Valley, AZ

Exposure

Lum    120 min (12 x 10 min, bin 1x1)

RGB    180 min (  6 x 10 min each, bin 1x1)

Software

CCDSoft, CCDStack, Photoshop CS w/ the Fits Liberator plugin, Noel Carboni's actions.

CCDStack to register, normalize, data reject & combine sub exposures. 

eXcalibrator for (b-v) color calibration, using 15 stars from the NOMAD1 database.

PixFix32 (pre-beta) to repair hot/cold pixels and column defects.

PhotoShop for luminance processing and LRGB combine.

Comment

North is to the top.

Messier 29 (M29, NGC 6913), Discovered 1764 by Charles Messier, is a open cluster located in the area of Milky Way near Gamma Cygni, at a distance of 4000 or 7000 light years. The uncertainty of distance is due to inaccurately known absorption of the cluster's light. Surrounding the cluster, and to the right, is the red emission nebula DWB33.