The M3 Globular Cluster
Orion 8" f/3.9 Astrograph

 
 This
            was the first clear night in a very long time in which we could
            get up to our second observatory in Happy Jack and do some dark
            sky imaging. This night was "Globular night" - I shot
            half a dozen globular clusters with the 8 inch, and it did a
            great job at sharp stars and in this shot, the magnitude limit
            for galaxies is around 17 for this 15 min exposue. The small
            edge on to the left is 14.3 magnitude and the tiny one to the
            left of the orange star on the upper left is mag 17.
 

            
Select an image size for 
a larger view:

1600 x 1200



Optics:  8" f/3.9 Newtonian Astrograph w/Baader MPCC Coma Corrector
Platform:  Homemade GEM with Byers Starmaster Drive 
Camera:  Hutech Modified Canon XTi @ ISO800
Exposure:  3x 5m
Location:  Happy Jack, Arizona
Elevation:  6850 ft.
Sky:  Seeing  8/10, Transparency 9/10
Outside Temperature:  35F
Processing Tools:  Photoshop CS2, Images Plus 3.82
HOME   GALAXIES     EMISSION NEBS     REFLECTION NEBS   COMETS  
   GLOBULARS     OPEN CLUST     PLANETARIES     LINKS