If observed with a binocular, IC 4665 is
a beautiful open cluster rich of bright stars, situated a litte above Beta
Oph (visible on the lower edge).
|
Technical Data
|
| Optics |
Pentax 75 apochromatic
refractor |
| Focal Lenght |
500 mm |
| Focal Ratio |
f/6,7 |
| Exposure Time |
35 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, 23.44 UT |
| Mount |
Gemini G41 |
| Tracking |
ST4 |
| Temperature and humidity |
T=+11°C, RH=62% |
| Notes |
- |
