About this Image
The globular cluster M 5 in the constellation Serpens is often overseen in comparison the famous M 13 cluster.
It is situated approx. 25.000 light-years away. The cluster extends 23 arc min, one of the biggest apparent clusters in the sky.
16 " cassegrain in secondary focus at f/10
|Camera||SBIG STL-11000M at -15C, 8-pos STL filter wheel|
|Date||June 18, 2009|
|Sky Conditions||Mag 5.5 skies, raw FWHM 1.9-2.5" temperature 15 C,|
L:R:G:B = 60:40:40:40 min (5 min L, 20 min RGB sub-exposures);
Maxim DL 4.5;