astroimages
Darin E. Fields' Astrophotography Pages
 

M21: Open Cluster in Sagittarius

Right Ascension18 : 04.6 (h:m)
Declination-22 : 30 (deg:m)
Distance4.25 (kly)
Visual Brightness6.5 (mag) 
Apparent Dimension13.0 (arc min)
More information on M21
 
 
 

56 second (8 x 7 sec.) exposure using the PC camera with Dave Allmon's QCV2 software on the 8" Newtonian.

Dark frame processing, image alignment, and stacking was done with Dave Allmon's DarkGen program.
Final processing performed with Photoshop.
7/7/2000