|
|
|
|
|
| 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°. |
|
|
 |