| Date 2014/03/06 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 8 300 (Finger Lakes Instruments) - regulated at -30o Celsius |
| Image type | Ha (RVsB) (Vs for synghetic green) |
| Exhibition | Ha (11 x 3 'bin 2 × 2), R and B (4 x 2' bin 3 × 3 each) |
| Pretreatment | Maxim DL |
| Treatment | Photoshop and PixInsight |
| Specific treatment | Create a synthetic green image |
Object description
| Object type | Emission nebula "The Monkey's Head nebula" |
| Constellation | Orion |
| Visual magnitude | 8 |
| Distance | 6400 light years |
| Diameter | 15,9 light years |
| Dimension seen from Earth | 40 x 30 arc minutes |
| The NGC2174 emission nebula, nicknamed "The Monkey's Head Nebula", contains the open cluster NGC2175 which can be seen in the image in the upper left section (representing the monkey's eye). For this reason, many refer to the Monkey Head nebula as NGC2174 or NGC2175 for confusion. To visually see this nebula, 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 very well, despite an acquisition time of only 49 minutes. |
| Richard Beauregard Sky Astro - CCD My impression "We cannot be alone in this gigantic universe" |