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| Optics | Pentax 75 |
| Focal Lenght | 500mm |
| Focal Ratio | f/6.7 |
| Exposure Time | 1h40m (single
exp of 10 min) |
| CCD | Canon EOS 5D
with baader filter |
| Location | Colle dell'Agnello (CN,
Italian Alps) at 2700 m height |
| Date |
21 Aug 2009 |
| Mount | Gemini G-41 |
| Tracking | ST4 on a 80mm
f/5 refractor |
| Temperature and humidity | T=+9°C,
RH=80% |
| Sky brightness at zenith (with SQM-L) | 21.5 mag/arcsec^2 |
| Notes | - |
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