The Great Globular in Hercules is one of the best known globular clusters in the northern sky.
Date: May 8, 2010
Constellation: Hercules
Location: Dominion Astrophysical Observatory, Victoria, BC
Optics: TeleVue NP-127is used at f/5.2
Mount: Paramount ME
Camera: SBIG ST-2000XM with CFW10 and LRGB Astrodon Filters
Binning: LRGB 1x1
Exposure Time: L 6x5m / R 6x5m / G 6x5m / B 6x5m (at -25C)
Processing: Light frames calibrated with dark and flat frames in ImagesPlus. Light frames normalized and combined using MinMax Excluded.