| Date 2012/02/24 Observation place French alps |
Technical
| Telescope | TMB Fluorite Triplet - Diam. 175 mm (7 ″), foca. 1400mm, f / 8 |
| Mount | Paramount ME |
| Imaging camera | SBIG STL 11K AO-L regulated at -20o Celsius |
| Image type | Ha (RGB) |
| Exhibition | Ha (11 x 7,5 'bin 2 × 2), RGB (4 x 3' bin 3 × 3 each) |
| Pretreatment | Maxim DL |
| Treatment | Photoshop and PixInsight |
Object description
| Object type | Emission nebula and open cluster |
| Constellation | Check |
| Visual magnitude | 10+ |
| Distance | 12000 light years |
| Diameter | 100 light years |
| Dimension seen from Earth | 40 x 30 arc minutes |
| IC410 is an emission nebula located 12000 light-years from Earth. It contains in its heart the open cluster NGC 1893. It is a dark nebula composed of a cloud of hydrogen. She looks like a rose. Here, the use of a Hydrogen Alpha filter as the luminance image is quite appropriate to bring out all the nuances of this superb nebula. The cloud is lit by stellar winds and radiation emitted from the open star cluster that formed in the interstellar cloud just 4 million years ago (compare to the age of the universe which is 13,6 billion years old)! The exposure time of nearly 2 hours of this wide-field image as well as a sky without light pollution, made it possible to detail the dark dust which surrounds the nebula, especially in the bottom and the right side of the image. We also see appearing to the right of the center of the nebula and slightly downwards two cosmic "tadpoles" measuring 10 light years long. They are made up of cooler, denser gas and dust. Their particular shape is sculpted by the winds and the radiations of the stars of the cluster. As seen in the image, their trail points away from the central region of the cluster. This a region conducive to the formation of new stars. |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |