|
|
|
Optics | TEC 140 |
Focal Length |
1011 mm |
Focal Ratio | f/7.2 |
Exposure Time | 3 h 50 min
(single exp of 10 min), Ha-RGB 90:40:40:60 min |
CCD | SBIG STL-11000M @-30°C |
Location | Colle dell'Agnello (CN, Italian Alps) at 2700 m height |
Date |
9 August 2013 (two nights) |
Mount | Gemini
G-41 |
Tracking | Lodestar
on an 80mm f/5 refractor |
Temperature and humidity | T= +4 °C, RH=65% |
Sky brightness at zenith (with SQM-L) | 21.4 mag/arcsec^2 |
Notes | North at
top. |
|