Technical Data
|
Optics |
TEC 140
|
Focal
Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
Total 14
h 50 min, composed of OIII-Ha-RGB
480:270:50:50:40 min (single exp of
30 min for OIII and Ha, and 10 min for RGB) |
CCD |
SBIG
STL-11000M @-30°C
|
Location |
Colle
dell'Agnello, Rifugio degli Alpini Mario Bottero
(CN, Italian Alps) at 2700 m height
|
Date
|
25-26-28-29-30
August 2019 (5 nights)
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= (+10
to +5) °C, RH=(86 to 100) %
|
Sky brightness at
zenith (with SQM-L) |
(21.5 to 21.7)
mag/arcsec^2 |
Notes |
Impressively
humid nights, with many local clouds that ruined
part of all the nights, but very dark.
|