Object: Elephant's Trunk vdB142 Date: 05.09.10 Location: Oberes Schlierental 1450m ü. M. SQM: partly cloudy Telescope: Astrooptik Keller Cassegrain 400mm f/9 Mount: ALT-7 Autoguiding: Second chip in SBIG STL-11000M Camera: SBIG STL-11000M Filter: H-alpha Dark Frame: -25°C Exposure: 2x900s + 2x1800s, total 90minutes |
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