Witch Head NebulaIC2118 - NGC1909 in Eridanus
From Wikipedia: IC 2118 (also known as Witch Head Nebula due to its shape) is an extremely faint reflection nebula believed to be an ancient supernova remnant or gas cloud illuminated by nearby supergiant star Rigel in Orion. It lies in the Eridanus constellation, about 900 light-years from Earth. The nature of the dust particles, reflecting blue light better than red, is a factor in giving the Witch Head its blue color. This photography was taken in La Banderita observatory, La Pampa, Argentina with a total integration time of 3 hours 25 min. The used equipment setup: Astrotech 65 mm F6.5 APO refractor, unmodified Canon 6D camera, Sky Watcher Star Adventurer mount (modified for DEC guiding) and homemade anti-dew system.
Technical data
| Acquisition site | La Banderita Observatory , La Pampa, Argentina |
| Acquisition dates | 10-12-201810-13-2018 |
| Instrument | Astrotech 65 mm F6.5 APO Refractor. |
| Mount | Sky-Watcher Star Adventurer, (modified: DEC Guiding capable) |
| Guide | QHY Miniguider, with QHY5L-II-M camera (RA and DEC guiding) |
| Camera | Canon 6D (Unmodified) |
| Camera sensor temperature | 18°C approx.(as reported by camera - non refrigerated) |
| Integration | 41 subframes @ ISO 1600, 5 minutes each (total integration time: 3 hours 25 minutes) |
| Calibration | 49 flats, 100 bias, 35 darks. |
| Resolution | 3.19 arcsec/pixel 420 mm focal lenght, 6.5 um x 6.5 um pixels |
| Native size | 5496 x 3670 pixels |
| Cropped size | 5365 x 3425 pixels |
| FOV | 4°45’ x 3° 2' |
| Image center coordinates | RA: 5 h 5 min Dec: -6° 50' Rotation: -92° |
| Acquisition | Maxim DL |
| Process | PixInsight 1.8 |