|
|
The Orion sword, visible with the naked eye, is composed in the center of M42 nebula, at top of the open cluster NGC 1981 and the blue nebula NGC 1977, and at bottom of the star Iota Ori. Very interesting is pushing the elaboration of this image, visible below, where tens of very dim nebulas come out, they surround completely M42 nebula and are connected to the Horsehead complex, a part of wich is visible in the top-left corner of the image.
See also:
|
|
|
| Optics | Pentax 75 apocromatic refractor, 75mm diameter |
| Focal Lenght | 500 mm |
| Focal Ratio | f/6,7 |
| Exposure Time | 35 and 40 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, 22.26 UT and 12 january 2002, 22.08 UT |
| Mount | Meade 8" |
| Tracking | ST4 |
| Temperature and humidity | T=-5°C, RH=90% and T=-4°C, RH=40% |
| Notes | Compositation of two images taken in two following nights |
|
|
 |