About this Image
The globular cluster NGC 5139 in Centaurus is the most massive star cluster with approx. 5 million suns.
It is situated approx. 16,000 light-years away. Most of the stars in this image belong to this huge cluster.
20 " Keller cassegrain in corrected secondary focus at f/9
|Camera||SBIG STL-11000M at -15C, 8-pos STL filter wheel|
|Date||Apr 29, 2008|
|Sky Conditions||dark skies, raw FWHM 1.5-1.6" temperature 15 C,|
L:R:G:B = 200:200:200:200 sec (100 sec sub-exposures);
Maxim DL 4.5;