Hemisphere:  Northern  ·  Contains:  Crescent nebula  ·  NGC 6888  ·  NGC6888  ·  Sh2-105
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Crescent nebula, 



    
        

            -Amenophis-
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Crescent nebula

Imaging telescopes or lenses: ASA - Astro Systeme Austria ASA 10'

Imaging cameras: Moravian G2-4000

Mounts: Paramount MyT

Guiding telescopes or lenses: ASA - Astro Systeme Austria ASA 10'

Guiding cameras: Moravian G1-0300

Focal reducers: ASA - Astro System Austria ASA 3" Wynne Reducer Korrektor 0,95x

Software: FocusMax  ·  The SkyX Pro  ·  MaxPilote  ·  PIXINSIGHT PixInsinght 1.8 RC7  ·  Photoshop CS6 Extended

Filters: Astrodon Blue  ·  Astrodon Red  ·  Astrodon Luminance  ·  Astrodon OIII 5nm  ·  Astrodon Ha 5nm  ·  Astrodon Green

Accessory: résistance chauffante


Dates:July 20, 2018

Frames:
Astrodon Blue: 24x300" bin 1x1
Astrodon Green: 24x300" bin 1x1
Astrodon Ha 5nm: 32x900" bin 1x1
Astrodon OIII 5nm: 32x900" bin 1x1
Astrodon Red: 24x300" bin 1x1

Integration: 22.0 hours

Avg. Moon age: 8.05 days

Avg. Moon phase: 57.04%


Astrometry.net job: 2158694

RA center: 20h 12' 8"

DEC center: +38° 19' 6"

Pixel scale: 1.679 arcsec/pixel

Orientation: 5.565 degrees

Field radius: 0.467 degrees


Resolution: 1408x1425

Locations: Jardin, TOUL, Lorraine, France

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. This sharp telescopic portrait uses narrow band image data that isolates light from hydrogen and oxygen atoms in the wind-blown nebula. The oxygen atoms produce the blue-green hue that seems to enshroud the detailed folds and filaments. Visible within the nebula, NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years. The nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away.

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-Amenophis-
-Amenophis-
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Crescent nebula, 



    
        

            -Amenophis-