The sinuous dark nebula Barnard 72. Three other dark nebulae are framed: B68, B69, and B71.
Date: June 13, 2010
Constellation: Ophiuchus
Location: Pearson College Observatory, BC
Optics: TeleVue NP-127is used at f/5.2
Mount: Losmandy G-11
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.