Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
Crescent Nebula in Cygnus, Steve Milne
Crescent Nebula in Cygnus
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Crescent Nebula in Cygnus, Steve Milne
Crescent Nebula in Cygnus
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Description

The Crescent Nebula - NGC 6888 - is an emission nebula around 5,000 light-years away in the constellation of Cygnus (The Swan).   Its central star is a Wolf-Rayet star (WR 136) which is ejecting gas as a fast stellar wind.  This stellar wind collides with and energizes gasses left over from the star's previous state as a red giant (around 250,000 years ago), leading to the 25 light-year diameter object seen here.  

NGC 6888 was imaged between 9 July and 9 August 2021.  Capture details are as follows:

Telescope: TEC 140 ED
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM 2000HPS

Ha: 30 x 1200s
OIII: 30 x 1200s
Red: 40 x 300s
Green: 40 x 300s
Blue: 40 x 300s

A total of 30 hours exposure.

Data: Steve Milne & Barry Wilson
Processing: Steve Milne

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    Crescent Nebula in Cygnus, Steve Milne
    Original
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    Crescent Nebula in Cygnus, Steve Milne
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B

Description: Some minor improvements.

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Crescent Nebula in Cygnus, Steve Milne