Witch Head Nebula
IC2118 - NGC1909 in Eridanus

Witch Head Nebula

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 10-12-2018
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