Hemisphere:  Southern  ·  Constellation: Eridanus (Eri)  ·  Contains:  65 psi Eri  ·  67 bet Eri  ·  69 lam Eri  ·  Cursa  ·  IC 2118  ·  IC2118  ·  NGC1720  ·  NGC1726  ·  NGC1752  ·  NGC1779  ·  NGC1797  ·  NGC1799  ·  PK205-26.1  ·  Part of the constellation Eridanus (Eri)  ·  The star Cursa (βEri)  ·  The star λEri  ·  The star ψEri  ·  Witch Head nebula
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IC2118 - The Witchhead Nebula in Eridanus (Reprocessed), 


            Arun H.
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IC2118 - The Witchhead Nebula in Eridanus (Reprocessed)

Technical card

Imaging telescopes or lenses: Canon 400mm f5.6L

Imaging cameras: Canon 5D Mark IV

Mounts: Losmandy GM811G

Dates:Dec. 9, 2018

Frames: 104x150"

Integration: 4.3 hours

Avg. Moon age: 2.04 days

Avg. Moon phase: 4.63%

Astrometry.net job: 3206889

RA center: 5h 4' 23"

DEC center: -7° 1' 6"

Pixel scale: 2.829 arcsec/pixel

Orientation: -179.821 degrees

Field radius: 2.612 degrees

Resolution: 3631x5574

Data source: Traveller


With the cloudy weather in Wisconsin, I decided to reprocess some of my old data with new processing techniques. The main difference between this and the original image is the use of noise reduction in the linear and non linear phase - here I used TGVDenoise and MMT in the linear phase and ACDNR in the non linear phase. This would be better with twice the integration time, but that’s a luxury I don’t have.

Link to original image: https://astrob.in/382627/


Sky plot

Sky plot


IC2118 - The Witchhead Nebula in Eridanus (Reprocessed), 


            Arun H.