|
Technical Data
|
| Optics |
Pentax 75 |
| Focal Lenght |
500mm
|
| Focal Ratio |
f/6.7
|
| Exposure Time |
2h (single
exp of 10 min)
|
| CCD |
Canon EOS 5D
with baader filter
|
| Location |
Colle
dell'Agnello (CN,
Italian Alps) at 2700 m height
|
Date
|
8 Aug 2010
|
| Mount |
Gemini G-41
|
| Tracking |
ST4 on a 80mm
f/5 refractor
|
| Temperature
and humidity |
T=+7°C,
RH=50%
|
| Sky brightness at zenith (with SQM-L) |
21.5 mag/arcsec^2 |
| Notes |
Strong wind.
Very interesting is the "check mark" dark nebula near Beta Scuti (LDN
532).
Diffraction spikes with StarSpikes software. |
