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IC2118 / Witch-Head Nebula

Classification: Reflection Nebula IC2110, NGC1909, Ced 41
Constellation: Eridanus (ERI)
Object Location: Ra 05h 05m 45s Dec -07° 29’59” (current)
Size & Distance: 3° x 1° Apx 1000 light years

Date & Location: 11-11-2018 & 1-3-2019 Little Blair Valley, CA
Exposure: LRGB 300-80-70-70 L=20x15 R=8x10, GB 7x10ea. (bin 1x1)
Optics: Telescope Engineering Company APO110FL w/ TEC FF @ f/5.74, 631mm using the Optec FocusLynx
Mount: Astro-Physics 1200 GTOCP4 / ATS 10x36 pier.
Camera: FLI-PL16803 @-25c / FLI CFW5-7 / Guided by SBIG ST-I / w OAG.
Filters: Astrodon G2 50mm square LRGB
Software: MaxImDL 6.10, Photoshop CS5, CCDStack, Topaz Studio.

Notes: Sky conditions: Good seeing, No wind, Temp mid 20’s
Cropped Image Field of view is 196 x 173 arcmin. Image Scale 2.94 arcsec/pix

The Witch Head is an extremely faint reflection nebula in the constellation Eridanus, with the surface brightness just above the sky background. This reflection nebula is illuminated by the light from a nearby supergiant Rigel (Beta Orionis) that lies about 2.5° away from the heart of the Witch Head. This illumination is caused by the starlight being reflected off particles of dust in a phenomenon known as Raleigh scattering.