|
|
|
Optics | Pentax 75 apo
refractor |
Focal Lenght | 500 mm |
Focal Ratio | f/6.7 |
Exposure Time | 1h30m (single
exp of 10 min) |
CCD | Canon EOS 5D
with baader filter |
Sensitivity | 800 ISO |
Location | Colle del
Nivolet (AO,
Italian Alps) at 2530 m height |
Date |
3 July 2011 |
Mount | Gemini G-41 |
Tracking | Lodestar at
100 mm focal lenght |
Temperature and humidity | T= +5°C,
RH=33% |
Sky brightness at zenith (with SQM-L) | 21.6 mag/arcsec^2 |
Notes | Very good
sky, transparent and clear. Unfortunately in the middle of the night,
veils ruined the show. North at right. |
|