| Date 2013/09/03 Observation place French alps |
Technical
| Telescope | AstroSysteme Austria Orion 305mm – 12″, 1086mm FL, f/3,62 |
| Mount | ASA Direct drive Mount DDM85 |
| Imaging camera | MicroLine 8300 (Finger Lakes Instruments) – regulated at -30o Celsius |
| Image type | Ha (RGB) |
| Exhibition | Ha (11 x 5 'bin 2 × 2), R, G and B (4 x 2' bin 3 × 3 each) |
| Pretreatment | Maxim DL |
| Treatment | Photoshop and PixInsight |
Object description
| Object type | Emission nebula |
| Constellation | Cepheus |
| Visual magnitude | +10 |
| Distance | 6000 light years |
| Diameter | 40 light years |
| Dimension seen from Earth | 50 x 40 arc minutes |
| The Cederblad 214 (Ced 214) emission nebula is very difficult to see in a telescope. To see it visually, you need a telescope with a large diameter and a sky without light pollution. For this photo, the use of a Hydrogen-Alpha filter as a luminance image made it possible to bring out the very beautiful shades and contrasts of the nebula in this light spectrum. Also, the choice of a site without light pollution and a telescope with a focal length f / 3,62 (very open) and a diameter of 305 mm (12 inches) helped to resolve this image. Also called Sharpless 171, Cederblad 214 is a young emission nebula with a diameter of about 40 light-years. Its visibility is fueled by the glow of hot young stars. It is also home to a small star cluster called Berkeley 59 that can be seen at the top right of the image. It probably represents a second generation of young stars whose formation was created by this vast cloud of expanding gas. Ced 214 is about 6000 light years from earth. |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |