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Contains:  NGC 281
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NGC 281, The Pacman nebula, 





    
        

            Steven Bellavia
NGC 281, The Pacman nebula

NGC 281, The Pacman nebula

Technical card

Resolution: 3600x2400

Dates:Nov. 8, 2018Nov. 9, 2018

Frames:
Astronomik 6nm OIII: 30x300" (gain: 1.00) bin 1x1
Optolong 7nm Ha 2": 24x300" (gain: 1.00) -15C bin 1x1

Integration: 4.5 hours

Darks: ~25

Avg. Moon age: 1.32 days

Avg. Moon phase: 2.23%

Bortle Dark-Sky Scale: 4.00

Temperature: 6.00

Astrometry.net job: 2360601

RA center: 0h 52' 42"

DEC center: +56° 41' 13"

Pixel scale: 1.360 arcsec/pixel

Orientation: 359.945 degrees

Field radius: 0.817

Data source: Backyard

Description

NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. This 20×30 arcmin sized nebulosity is also associated with open cluster IC 1590, several Bok globules and the multiple star, B 1. It collectively forms Sh2-184, spanning over a larger area of 40 arcmin. A recent distance from radio parallaxes of water masers at 22 GHz made during 2014 is estimated it lies 9200 lightyears away Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.
E. E. Barnard discovered this nebula in August 1883, who described it as "a large faint nebula, very diffuse."

Comments

Author

bellavia
Steven Bellavia
License: None (All rights reserved)
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            Steven Bellavia
    Original
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    NGC 281, The Pacman nebula, 





    
        

            Steven Bellavia
    C
  • NGC 281, The Pacman nebula, 





    
        

            Steven Bellavia
    D
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Sky plot

Sky plot

Histogram

NGC 281, The Pacman nebula, 





    
        

            Steven Bellavia