Technical Data
|
Optics |
TEC 140
|
Focal Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
4h20m
(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
|
18 August 2012
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= +14°C, RH=40-60%
|
Sky brightness at
zenith (with SQM-L) |
21.4-21.5 mag/arcsec^2
|
Notes |
Very
faint object. Heavy noise due to the faintness and maybe also to the
high temperature (very hot month even at high altitude).
|