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Contains:  Crescent nebula, NGC 6888
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NGC 6888 The Crescent Nebula, 


NGC 6888 The Crescent Nebula
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NGC 6888 The Crescent Nebula

Technical card

Imaging telescope or lens:Stellarvue SV080ST-25SV

Imaging cameras:

Mount:Ioptron CEM60

Guiding telescopes or lenses:

Guiding cameras:

Focal reducer:Stellarvue 0.8 FF&R

Software:PixinsightSequence Generator Pro

Filters:Astrodon Ha 31mm 5nmAstrodon 31mm 3nm OIII


Resolution: 6713x5348

Dates:Nov. 4, 2016


Integration: 0.0 hours

Darks: 0

Flats: 0

Flat darks: 0

Bias: 0

Avg. Moon age: 4.27 days

Avg. Moon phase: 19.24%

Bortle Dark-Sky Scale: None

Mean SQM: None

Mean FWHM: None

Temperature: None

Basic astrometry details job: 2946059

RA center: 20h 12' 24"

DEC center: +38° 43' 40"

Pixel scale: 0.982 arcsec/pixel

Orientation: 359.421 degrees

Field radius: 1.170 degrees

Data source: Backyard


NGC 6888 is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. the nebula is a shell of gas that is being energized by the strong stellar wind from the Wolf-Rayet star WR 136, the bright star at the center of the nebula. It is located in the constellation of Cygnus, the Swan. Wolf-Rayet stars are very hot, massive stars that are blowing off their outer layers.

This is a bi-color image shot through Astrodon ha and OII filters (13 exposures through each, 20 minutes per exposure). Total exposure time was 8.67 hours).

Taken October and November 2016 from my yard in Marietta, GA
Camera: Starlight Xpress Trius 814 (mono)
Mount: iOptron CEM60
Scope: Stellarvue SV80S @.8x


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NGC 6888 The Crescent Nebula,