|
Technical Data
|
| Optics |
Pentax 75 |
| Focal Lenght |
500mm
|
| Focal Ratio |
f/6.7
|
| Exposure Time |
1h (single
exp of 10 min)
|
| CCD |
Canon EOS 5D
with baader filter
|
| Location |
Colle
dell'Agnello (CN,
Italian Alps) at 2700 m height
|
Date
|
7 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) |
21.4 mag/arcsec^2 |
| Notes |
Strong wind
The Milky way center is at about 3° West of the center of this
image. North is at top-left corner. The brightest star in the top part
is TYC 6849 1230 with a V mag. of 5.76. The small cluster near the dark
nebula LDN 97 is NGC 6520. Diffraction spikes with
StarSpikes software. |
