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Optics | TEC 140 |
Focal Length |
1011 mm |
Focal Ratio | f/7.2 |
Exposure Time | 5 h 20 min
(single exp of 10 min), L-RGB 140:50:50:80 min |
CCD | SBIG STL-11000M @-25°C |
Location | Colle dell'Agnello (CN, Italian Alps) at 2700 m height |
Date |
5 August 2013 |
Mount | Gemini
G-41 |
Tracking | Lodestar
on an 80mm f/5 refractor |
Temperature and humidity | T= +12 °C, RH=48% |
Sky brightness at zenith (with SQM-L) | 21.7 mag/arcsec^2 |
Notes | North at left. Really dark night thanks to the clouds on the Po Valley in Piedmont. |
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