|
Technical Data
|
| Optics |
TEC 140
|
| Focal
Lenght |
1011 mm
|
| Focal
Ratio |
f/7.2
|
| Exposure
Time |
1h40m
(single exp of 10 min)
|
| CCD |
Canon
EOS 5D with baader filter
|
| Sensitivity |
800 ISO
|
| Location |
Colle
dell'Agnello (CN, Italian Alps) at 2700 m height
|
Date
|
2 August
2011
|
| Mount |
Gemini
G-41
|
| Tracking |
Lodestar
on an 80mm f/5 refractor
|
| Temperature
and
humidity |
T=
+8°C, RH=76%
|
| Sky brightness at
zenith (with SQM-L) |
21.6 mag/arcsec^2 |
| Notes |
Compare
this image with the one taken a month before, with a
nearly identical sky, and exactly the same setup
(excluding telescope). Here is
the other Cocoon. |
