It has been quite apparent that fall has finally arrived.A few days ago the temps were warm and sunny with highs in the upper 70’s.But unfortunately,all good things must come to a end.The weather has taken a turn for the worst so,any thoughts of observing/imaging are just that….thoughts!.Oh well,perhaps the skies will be clear for the weekend?!.
Below is a shot of Globular cluster M15 that I imaged with the new laptop and Meade DSI.Like the Dumbbell neb,it isn’t of real high quality but,considering the quality of previous images taken with my Pentax ist DS,I am rather pleased with how little post processing I had to do,aside from a bit of sharpening,noise reduction and a boost in contrast.The image is a stack of 20 images at 15 second exposures.
Globular cluster Messier 15 (M15, NGC 7078) is among the more conspicuous of these great stellar swarms. At a distance of about 33,600 light years, its diameter of 18.0 arc min corresponds to a linear extension of about 175 light-years, and its total visual brightness of 6.2 magnitudes corresponds to an absolute magnitude of -9.17, or roughly 360,000 times that of our sun. Its brightest stars are about of apparent magnitude 12.6 or absolute magnitude -2.8 or a luminosity of 1,000 times that of our Sun, and its horizontal branch giants are about of magnitude 15.6. Its overall spectral type has been determined as F3 or F4. The globular cluster is approaching us at 107 km/sec.
Information courtesy of :SEDS
Image courtesy: ME!