Technical Data
|
Optics |
TEC 140
|
Focal
Length
|
1011 mm
|
Focal
Ratio |
f/7.2
|
Exposure
Time |
Total 9
h 5 min, composed of OIII-Ha-RGB
270:210:25:20:20 min (single exp of
30 min for OIII and Ha, and 5 min for RGB) |
CCD |
SBIG
STL-11000M @-20°C and
-25°C
|
Location |
Pian
dell'Armà, pratone dei Milanesi (PV, Italian
Apennines) at 1350 m height
|
Date
|
28-29
June 2019 (2 nights)
|
Mount |
Gemini
G-41
|
Tracking |
Lodestar
on an 80mm f/5 refractor
|
Temperature
and
humidity |
T= (+19
to +16) °C, RH=(70 to 100) %
|
Sky brightness at
zenith (with SQM-L) |
(21.4 to 21.6)
mag/arcsec^2
|
Notes |
Quite
hot and humid nights, but very dark even if not
always perfectly transparent.
|