Technical Data
|
Optics |
TEC 140
|
Focal Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
Total 9 h, composed of OIII-Ha-RGB 240:150:40:30:50 min
(single exp of 30 min for OIII and Ha, and 10 min for RGB) |
CCD |
SBIG STL-11000M @-30°C
|
Location |
Saint Barthelemy, Passet field (AO, Italian Alps) at 1962 m height
|
Date
|
10-11 August 2018 (2 nights)
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= (+10 to +6) °C, RH=(40 to 90) %
|
Sky brightness at
zenith (with SQM-L) |
(21.4 to 21.7) mag/arcsec^2
|
Notes |
The first night was perfectly clear and extremely dark, while about 50% of the second night was clouded.
|