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Optics | TEC 140 |
Focal Lenght | 1011 mm |
Focal Ratio | f/7.2 |
Exposure Time | 6h10m
(single exp of 10 min) |
CCD | Canon
EOS 5D with baader filter |
Sensitivity | 800 ISO |
Location | Colle
dell'Agnello (CN, Italian Alps) at 2700 m height |
Date |
3 and 4
August 2011 |
Mount | Gemini
G-41 |
Tracking | Lodestar
on an 80mm f/5 refractor |
Temperature and humidity | T=
+10°C, RH=75% |
Sky brightness at zenith (with SQM-L) | 21.6 mag/arcsec^2 |
Notes | A very faint and difficult nebula in Cepheus. Two nights of exposures were collected to get a decent SNR. |
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