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| Optics | Pentax 75 |
| Focal Lenght | 500 mm |
| Focal Ratio | f/6.7 |
| Exposure Time | 1h30min
(single
exp of 10 min) |
| CCD | Canon EOS 5D
with baader filter |
| Location | Cosola (AL,
Italian Appennines) at 1100 m height |
| Date |
22 Feb 2009 |
| Mount | Gemini G-41 |
| Tracking | ST4 on a 80mm
f/5 refractor |
| Temperature and humidity | T= - 3°C,
RH=50% |
| Sky brightness at zenith (with SQM-L) | 21.4 mag/arcsec^2 |
| Notes | Tracking and
alignment on the comet. |
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