NGC 2359: Thor's Helmet


NGC 2359

Object Data

Object type: Emission Nebula
Size: 30 light years
Magnitude: 11.4
Constellation: Canis Major
Distance: 11,900 light years
Notes: The central star is the Wolf-Rayet star WR7, an extremely hot star thought to be in a brief pre-supernova stage of evolution.

Exposure Data

Date: 1/11 - 1/15/21
Location: Backyard Observatory, Carlsbad, CA
Telescope: TEC 140 Refractor;  fl = 980 mm at f/7
Camera: QSI 683-wsg-8 with Astronomik Filters
Mount: Losmandy G-11 Gemini 1
Exposure time: Ha:  21 x 15min, OIII: 16 x 15 min, RGB: 12 x 5 min each
Exposure time total: 12.25 hrs
This is a bicolor narrowband image with Ha = red; and OIII = blue and green.  RGB channels used for star color


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