|
Technical Data
|
| Optics |
Pentax 75 |
| Focal Lenght |
500mm
|
| Focal Ratio |
f/6.7
|
| Exposure Time |
4h20min
(single
exp of 10 min)
|
| CCD |
Canon EOS 5D
with baader filter
|
| Location |
Colle
del Nivolet (AO,
Italian Alps) at 2530 m height
|
Date
|
17-18 and 19
Jul 2010 (two nights)
|
| Mount |
Gemini G-41
|
| Tracking |
ST4 on a 80mm
f/5 refractor
|
| Temperature
and humidity |
T=+6 to
+2°C,
RH=50 to 100%
|
| Sky brightness at zenith (with SQM-L) |
21.2 to 21.5 mag/arcsec^2 |
| Notes |
North America nebula is just
East of this field of view. Diffraction spikes with
StarSpikes software. |
