Proudy's Astrophotography with the GSTAR CCD Camera
unguided video astrophotography

M75, NGC6864
Constellation: Sagittarius (The Archer), RA 20h 06.1m DEC -21d 55m
Distance: 59,300 light years, Visual Magnitude: 8.6, Diameter: 7 arc mins


- Imaged on 20091006
- 250mm, 10" F/4.7 Newtonian Reflector
- 500 video frames with IR/UV blocking filter at x128 integration
- Bahtinov focusing mask
- rough polar alignment, no moon, good seeing, elevation about 65 degrees
- stacked in Registax 5.0
- processed in Photoshop 7.0