Antilhue - Chile
Antilhue - Chile
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| Designation | Rosette Nebula, NGC 2244 |
| Object type | Open cluster and emission nebula |
| Coordinates | 06h33min +04°52' (Monoceros) |
| Description | A bright scattered cluster embedded in a beautiful nebulosity that shows a lot of activity. The whole nebular ring is at least 90 arcminutes across, three times the diameter of the full moon. Thus, a rich field telescope is needed to show this magnificent object in its entirety. The nebula emits strongly in the light of Ha (hydrogen alpha - as shown here) and O-III (oxygen ions). It belongs to the much larger Monoceros molecular cloud, parts of which can be seen towards the bottom and right. The field of view is about 4° x 3° with south towards the top. |
| Exposure | Ha 5 x 15min @ -15°C - 1x1 - unguided |
| Camera | SBIG ST-10XE + SBIG CFW-8 with Custom Scientific 4.5nm Ha filter |
| Optics | Sun 200mm f/3.5 telephoto lens (first light on CCD) |
| Mount | Astro-Physics AP900GTO |
| Software | MaxIm DL/CCD, Sigma Pre Beta 11, Registar, Adobe Photoshop 6.0 |
| Location - Date - Time | San Esteban (Chile) - 23Nov2003 - 07:30 UTC |
| Conditions | Transparency 5, Seeing 6, Temperature +15°C |
