|
NGC
6946 galaxy and NGC 6939 cluster
|
A strange pair of objects, a galaxy and
an open cluster, at the border of Cygnus and Cepheus: the distance is 38'.
|
Technical Data
|
| Optics |
Pentax 75 apochromatic
refractor |
| Focal Lenght |
500 mm |
| Focal Ratio |
f/6,7 |
| Exposure Time |
40 min exposure |
| Film |
Kodak E200 |
| Developement sensibility |
320 ISO |
| Location |
Capanne di Cosola (AL,
on the Appennines, Italy) at 1500m |
| Date and time of exposure
start |
31 may 2003, 22.10 UT |
| Mount |
Gemini G41 |
| Tracking |
ST4 |
| Temperature and humidity |
T=+10°C, RH=73% |
| Notes |
- |
