A half degree south of bright Alnitak (the
east component of Orion's belt) there is the famous Horsehead nebula, made
famous by the divulgation of the professional astrophotos and not by the
beauty at the telescope. In fact, visually, it's a very difficult object,
that need particular filters, big telescopes and very dark skys. Another
nice nebula is Flame, at east of Alnitak.
See also:
|
Technical Data
|
| Optics |
Pentax 75 apocromatic
refractor, 75mm diameter |
| Focal Lenght |
500 mm |
| Focal Ratio |
f/6,7 |
| Exposure Time |
35 min exposure |
| Film |
Kodak E200 |
| Developement sensibility |
320 ISO |
| Location |
Pian dell'Armà
(PV, Italian Appennines), at 1400m |
| Date and time of exposure
start |
11 january 2002, 23.07
UT |
| Mount |
Meade 8" |
| Tracking |
ST4 |
| Temperature and humidity |
T=-5°C, RH=90% |
| Notes |
- |
