Technical Data
|
Optics |
TEC 140
|
Focal Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
3h10m
(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
|
24 August 2012
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= +10°C, RH=60%
|
Sky brightness at
zenith (with SQM-L) |
21.5 mag/arcsec^2
|
Notes |
Transiting clouds ruined part of the exposures, so the total is limited to about 3 hours.
|