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Medusa Nebula (Abell 21) @ DSW, 





    
        

            Miles Zhou
Medusa Nebula (Abell 21) @ DSW

Medusa Nebula (Abell 21) @ DSW

Technical card

Resolution: 4096x3458

Dates:Dec. 26, 2017Jan. 11, 2018Jan. 14, 2018

Frames:
Astrodon 5nm Halpha: 21x1800" -25C bin 1x1
Astrodon RGB: 69x300" -25C bin 1x1
Astrodon O-iii: 21x1800" -25C bin 1x1

Integration: 26.8 hours

Avg. Moon age: 19.75 days

Avg. Moon phase: 27.71%

Astrometry.net job: 1912047

RA center: 112.250 degrees

DEC center: 13.312 degrees

Pixel scale: 0.551 arcsec/pixel

Orientation: 125.695 degrees

Field radius: 0.410 degrees

Locations: Deep Sky West, Rowe, New Mexico, United States

Description

The Medusa Nebula, PK 205+14.1, is a very old planetary nebula in Gemini, on the border with Canis Minor. It also known as Abel 21 and Sharpless 2-274. The Medusa was discovered in 1955, and until the early 1980s it was thought to be a supernova remnant.

This is an HRhGBo composition, in which, Oiii enhances in the blue/purple color.

Comments

Author

mileszhou
Miles Zhou
License: None (All rights reserved)
1162
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Revisions

  • Medusa Nebula (Abell 21) @ DSW, 





    
        

            Miles Zhou
    Original
  • Medusa Nebula (Abell 21) @ DSW, 





    
        

            Miles Zhou
    B
  • Final
    Medusa Nebula (Abell 21) @ DSW, 





    
        

            Miles Zhou
    C

C

Correct color

Sky plot

Sky plot

Histogram

Medusa Nebula (Abell 21) @ DSW, 





    
        

            Miles Zhou

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