Object: Ring Nebula Date: 15.07.10 Location: Oberes Schlierental 1450m ü. M. SQM: 21.40m/s2 at 00:30UTC by 14°C Telescope: Astrooptik Keller Cassegrain 400mm f/9 Mount: ALT-7 Autoguiding: Second chip in SBIG STL-11000M Camera: SBIG STL-11000M Filter: SII Dark Frame: -20°C Exposure: 6x1800s, total 180minutes |
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