Archive for the ‘Galaxy cluster’ Category

Copeland’s septet (Hickson 57)

Thursday, April 20th, 2006

Contained in about 6 arc-minute area are seven galaxies to challenge those with large aperature scopes and dark skies (or Stellacams from light polluted backyards). I didn’t have the gamma set correctly set on the Stellacam when I took these. I’m learning that the gamma setting needs to be on medium for faint objects — if it is off there is not much to stack. There should be more detail, I’m going to visit this object again soon. Image taken last evening, April 20 just after midnignt with Nexstar11 telescope, Meade F3.3 focal reducer, and Stellacam2 video camera, gain 9/14, gamma off (unfortuantely), and integrate at 256.

Copeland's septet of galaxies in constellation Leo