Technical Data
|
Optics |
TEC 140
|
Focal Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
Total 7 h, LRGB 230:70:60:60 min
(single exp of 10 min) |
CCD |
SBIG STL-11000M @-30°C
|
Location |
Capanne di Cosola (AL, Italian Apennines) at 1500 m height
|
Date
|
24-25
October 2014 (two nights, but the first with some veils and the second
one with only very few exposures due to incoming clouds)
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= +5 °C, RH= 45 %
|
Sky brightness at
zenith (with SQM-L) |
21.2 mag/arcsec^2
|
Notes |
North at right.
|