Object: Ring Nebula M57 Date: 17.06.09 Location: Oberes Schlierental 1450m ü. M. SQM: 21.30m/s2 at 23:55UTC by 15°C Telescope: Astrooptik Keller Cassegrain 400mm f/9 Mount: ALT-7 Autoguiding: Second chip in SBIG STL-11000M Camera: SBIG STL-11000M |
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