IC 2118 – Witch Head Nebula
IC 2118, known as the Witch Head Nebula, is an extremely faint reflection nebula located in the constellation Eridanus, on the border with Orion, about 2.6 degrees east of Rigel, the star that illuminates it. It is an extensive cloud of fine interstellar dust grains with an apparent size of 160.0 × 60.0 arcminutes, an apparent magnitude of +10.0, and an approximate distance of 900 light-years.
General information
- Constellation
- Eridanus
- Category
- Nebulae
- Date
- 3 January 2022
Capture
- Total time
- 3h 10min
- Subframes
- 300s (light frames: 38x) ISO 1600
- Gain / Offset
- 0 / 0
- Calibration
- 15 dark frames, 100 flat frames, 98 dark-flat frames and 100 bias frames
Equipment
- Telescope
- TS102 f/7
- Camera
- modified Nikon D90
- Filters
- Ha+OIII/Hb
- Mount
- HEQ-5 Pro belt drive
- Guiding
- PHD2, Guide scope 60mm/f4 + ASI224MC
Processing and environment
- Processing
- Stacked and post-processed with PixInsight 1.8
- Acquisition
- NINA
- Location
- l'Ampolla
- Sky
- Bortle 4