| Date 2011/03/09 Observation place New Mexico |
Technical
| Telescope | AstroSysteme Austria N8 - Dia. 200mm (8 ''), focal length 720mm, f / 3,6 |
| Mount | Paramount ME |
| Imaging camera | Apogee Alta U8300 regulated at -30o Celsius |
| Image type | Ha (RGB) |
| Exhibition | Ha (10 x 12 'bin 1 × 1), RGB (3 x 5' bin 2 × 2 each) |
| Pretreatment | nebulosity |
| Treatment | Photoshop and PixInsight |
Object description
| Object type | Emission nebula and open cluster "La Rosette" |
| Constellation | Unicorn |
| Visual magnitude | 5,5 |
| Distance | 5500 light years |
| Dimension seen from Earth | 80 x 60 arc minutes |
| The Rosetta Nebula looks like a sparkling pink carnation. In the center, the star cluster NGC 2244 is easy to identify with binoculars. These stars were formed about 4 million years ago. The glow of the nebula comes from the ionization of the gas it contains by the ultraviolet radiation from this group of very hot massive stars. These stars are also responsible for the "rosette" appearance of the nebula. In addition, they emit a stellar wind which clears the center of the nebula, which also allows the creation of new stars by compressing the cloud of gas and dust. |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |