Instrument

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

Mount

Paramount ME

Camera

SBIG ST-7 w/ CFW-8A filter wheel, Custom Scientific filters

Acquisition Data

10/21/2008 to 10/30/2008  Chino Valley, AZ

Exposure

Lum     100 min (20 x 5 min, bin 1x1)

Red       60 min (12 x 5 min, bin 1x1)

Green    60 min (12 x 5 min, bin 1x1)

Blue      90 min (18 x 5 min, bin 1x1)

Software

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

CCDStack to register, normalize, data reject, combine and luminance sharpen & DDP.

PhotoShop for the color combine.

Comment

North is to the top.

Discovered by William Herschel on September 24, 1785 in the small constellation Delphinus. NGC 6934 is 50,000 light years from Earth and is about 118 light years in diameter. The cluster is simply a 15 billion-year-old ball of hundreds of thousands of stars.