| M55, NGC6809 Constellation: Sagittarius (The Archer), RA 19h 40m DEC -30d 57m Distance: 17,000 light years, Visual Magnitude: 6.3, Diameter: 19 arc mins |
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| - 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 |