The name is strange, but the appearance
to it is very high (see it downunder). Observed with a binocular it wonder
for the lineary aligned stars of about the same brightness. The official
name is Collinder 339 but is also often named Brocchi's cluster.
In this image is also visible the little
open cluster NGC6802, east of Coathanger.
See also the shot
with 200mm.
|
Technical Data
|
| Optics |
Pentax 75 apochromatic
refractor |
| Focal Lenght |
500 mm |
| Focal Ratio |
f/6,7 |
| Exposure Time |
15 min exposure |
| Film |
Kodak E200 |
| Developement sensibility |
320 ISO |
| Location |
Capanne di Cosola (AL,
on the Appenninus, Italy) at 1500m |
| Date and time of exposure
start |
15 may 2002, 2.19 UT |
| Mount |
Gemini G41 |
| Tracking |
ST4 |
| Temperature and humidity |
T=+8°C, RH=52% |
| Notes |
Taken during the morning
twilight |
