Mario Brus
7/3/2011 10:16:23 PM
A Study in Globulars - M19
Magnitude 6.8
Distance from earth: 28,000 ly
Distance from galactic center: 5,200 ly
Constellation: Ophiuchus
Dimensions: 5' visually; 13.5' imaged
Diameter: 140 ly
Distinctives: Most oblate of the globulars; I tried to do a rough measurement and found the long axis about 15% longer than the short axis.
Meade LX200GPS at f/10 guided; Canon 30D modified; ASA1600; 10 sec subs; Deep Sky Stacker and Photoshop post-processing. I took 75 subs, the first three of which were 30s, 20s, 15s, and the rest were 10 seconds to see if I could bring in more detail w/o washing out the core. I am not sure I succeeded.
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