|
Technical Data
|
| Optics |
TEC 140
|
Focal Length
|
1011 mm
|
| Focal
Ratio |
f/7.2
|
| Exposure
Time |
Total 8 h 50 min, composed of Ha-RGB 360:70:40:60 min
(single exp of 30 min for Ha and 10 min for RGB) |
| CCD |
SBIG STL-11000M @-35°C and @-40°C
|
| Location |
Capanne di Cosola (AL, Italian Appenines) at 1500 m heigth
|
Date
|
17-18 November 2017 (2 nights)
|
| Mount |
Gemini
G-41
|
| Tracking |
Lodestar
on an 80mm f/5 refractor
|
| Temperature
and
humidity |
T= (+2 to 0) °C, RH=(50 to 100) %
|
| Sky brightness at
zenith (with SQM-L) |
(20.8 to 21.2) mag/arcsec^2
|
| Notes |
Very strong wind in the first night, so I got only 1/4 of good RGB images; veils in the second night, so the Ha images are limited.
|
