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Optics | Pentax 75 |
Focal Lenght | 500mm |
Focal Ratio | f/6.7 |
Exposure Time | 40m (single
exp of 10 min) |
CCD | Canon EOS 5D
with baader filter |
Location | Colle dell'Agnello (CN,
Italian Alps) at 2700 m height |
Date |
20-21-22 Aug 2009 |
Mount | Gemini G-41 |
Tracking | ST4 on a 80mm
f/5 refractor |
Temperature and humidity | T=+10°C,
RH=50-70% |
Sky brightness at zenith (with SQM-L) | 21.5-21.8 mag/arcsec^2 |
Notes | Imaged very low on the horizon, in mean only 8°. |
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