Antilhue - Chile
Antilhue - Chile
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| Designation | IC 434 (top), B33 (Horsehead Nebula), NGC 2023 (bottom left) |
| Constellation | Orion (Ori) |
| Coordinates | 05 h 41 min -02° 28' |
| Description | The Horsehead nebula (B33) is
actually a dark interstellar cloud in our Milky Way that obscures part of
a bright red emission nebula. This is IC 434 which is excited by bright
Alnitak (Zeta Ori) just outside the field on the left (north). The blue
reflection nebula NGC 2023 shines at lower left. Reflections from
Sigma Orionis were incorporated in the image layout as 'cosmic spotlights'
to highlight the two main objects in the frame.
Click on the image for a higher resolution view and here for a close-up of the Horsehead in native resolution. The field of view is approx. 25' x 37'. Link to an earlier image with a 6" refractor. |
| Exposure | NRGB 220:75:75:75 min @ -25°C, RGB binned 2x2 |
| Camera | SBIG STL-11000 selfguided, Astronomik Type II RGB Filterset |
| Optics | RCOS 14.5" Ritchey-Chrétien @ f/9 (prime focus) |
| Mount | Astro-Physics AP1200GTO |
| Software | MaxIm DL/CCD, Sigma Pre Beta 11, Registar, Adobe Photoshop CS |
| Location - Date - Time | San Esteban (Chile) - 30/31Oct2005 - 07:00 UTC |
| Conditions | Transparency 7/10, Seeing 7/10, Temperature +11°C |
