clic for a 100% size center crop 1400 x 1052 (439 kB)
About this Image
According to newer sources, the globular cluster M92 is about 26,000 light years distant, only little more than its brighter apparent neighbor M13.
It may be a bit younger than M13 as its turnoff point is shifted to the brighter and bluer end.
TEC-140 refractor, no flattener at f/7
|Camera||SBIG STL-11000M at -20C, internal filter wheel|
|Date||Apr 21, 2006.|
|Sky Conditions||mag 5, average transparency, temperature 12 C,|
LRGB= 180:30:30:30 min (10-minute sub-exposures)
Image aquisition and calibration in Maxim DL 4.15; DDP in ImagesPlus;
Photoshop: curves, color balance, crop, unsharp mask;color noise reduction by Neatimage