Gemini South image and description: http://www.gemini.edu/node/181
Description
NGC 246 is a planetary nebula located in the constellation of Cetus about 1,600 light years distant. It is also known as the "Skull Nebula" and Caldwell 56. The proginator star is a white dwarf and is part of a binary pair that is not quite centered in the nebula.
Exposure: 10.5 hrs Total; 4.5 hrs OIII, 5 hrs H-a, 1 hr RGB
Telescope: RCOS 16
Mount: Software Bisque Paramount ME
Oag: Astrodon MonsterMOAG
Acquisition: CCD AutoPilot4
Calibration: CCDStack2
Observatory Site: Sierra-Remote Observatories, Shaver Lake, CA
Telescope: RCOS 16
Mount: Software Bisque Paramount ME
Oag: Astrodon MonsterMOAG
Acquisition: CCD AutoPilot4
Calibration: CCDStack2
Observatory Site: Sierra-Remote Observatories, Shaver Lake, CA
Camera: Apogee U16M
Filters: Astrodon 3nm OIII, H-a, Gen 2 RGB
Guider: SBIG ST-402
Camera Operation: MaximDL4.62
Processing: Photoshop CS5 Extended
Image Date: 11/02/2010 - 12/26/2010
Filters: Astrodon 3nm OIII, H-a, Gen 2 RGB
Guider: SBIG ST-402
Camera Operation: MaximDL4.62
Processing: Photoshop CS5 Extended
Image Date: 11/02/2010 - 12/26/2010