Object Information:

 

NGC 891 is a fine example of a spiral galaxy seen edge-on.  The estimated distance to NGC 891 is 10 million light years and its visual brightness is 10.1 mag.  More information on NGC 891 can be found at http://www.seds.org/messier/xtra/ngc/n0891.html

  Imaged at: 

 

Grandview Campground, Inyo National Forest, Inyo County, California;
Elevation - 8,400 feet

  Equipment:  

 

Optics - RC Optical Systems 10" Ritchey-Chrétien optical tube at f/9,
Mount - Astro Physics 1200 GTO,
Camera - Santa Barbara Instrument Group (SBIG) ST-10XME NABG CCD,
Filter - SBIG CFW-8 with Astrodon "E" Series CRGB filters

  Exposure Information:

 

September 3, 4, 2005
Luminance - a sum of eighteen, eight minute exposures for a total exposure time of 2.4 hours.

RGB - 6 x eight minute exposures for each color channel at 2x2 binning.

  Camera Control Software:

 

CCD Soft Ver. 5

  Image Processing Software:

 

Image calibration - MIRA AP 7; Final processing - Photoshop CS