| Date 2016-12-09 et 2017-01-22 Observation place New Mexico |
Technical
| Telescope | Takahashi FSQ 106ED, 106mm, f / 5 |
| Mount | Paramount ME |
| Imaging camera | SBIG STL 11000 regulated at -15o Celsius |
| Image type | Ha (RVsB) (Vs for synghetic green) |
| Exhibition | H-Alpha (10 x 10 'bin 1 × 1), RB (4 x 3' bin 2 × 2 each) |
| Pretreatment | Maxim DL |
| Treatment | Photoshop and PixInsight |
| Specific treatment | Create a synthetic green image |
Object description
| Object type | Emission nebula and open cluster "The Cone and Christmas Tree Nebula" |
| Constellation | Unicorn |
| Visual magnitude | 3,9 |
| Distance | 2600 light years |
| Diameter | 50000 light years |
| Dimension seen from Earth | 60 x 30 arc minutes |
| The nebula and the open cluster NGC2264 are referred to as "The Cone and Christmas Tree Nebula". In the image shown, we can see the cone in the center of the photo, slightly to the left. The Christmas tree appears after it to the right in a tilted position. We then see a nebula resembling a fir tree with its bright stars (the open cluster) in its center which, in turn, look like blue Christmas balls! The star cluster is very bright and easy to observe in small instruments. The emission nebula is very dark and difficult to observe, even in a site with little light pollution. In my image, which was taken in a wide field of view, the nebula and the cluster are in the center of the photo. Through the use of a Ha filter as a luminance image, I managed to capture the very dark nebulosities surrounding the NGC2264 nebula. In fact, the majority of the signal from this region is emitted in alpha hydrogen. |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |