Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
NGC 6888 - Crescent Nebula, 



    
        

            Doug_Bock
NGC 6888 - Crescent Nebula
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NGC 6888 - Crescent Nebula

NGC 6888 - Crescent Nebula, 



    
        

            Doug_Bock
NGC 6888 - Crescent Nebula
Powered byPixInsight

NGC 6888 - Crescent Nebula

Equipment

Imaging Telescopes Or Lenses
GSO 10" f/8 RC Truss
Imaging Cameras
ZWO ASI071C Pro
Mounts
Losmandy G11
Accessories
Innovations Foresight ONAG SC
Software
PixInsight 1.8.5 Ripley · SGPRO · DeepSkyStacker 4.1.1 64bit · Optec Inc. FocusLock · PHD2
Guiding Telescopes Or Lenses
GSO 10" f/8 RC Truss
Guiding Cameras
ZWO ASI071MC-Cool

Acquisition details

Dates:
Aug. 29, 2020
Frames:
84x300" (7h) (gain: 300.00) 0C bin 1x1
Integration:
7h
Darks:
24
Flats:
50
Avg. Moon age:
11.21 days
Avg. Moon phase:
86.35%
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 3810115

RA center: 20h12m09s.1

DEC center: +38°2024

Pixel scale: 0.490 arcsec/pixel

Orientation: 83.452 degrees

Field radius: 0.369 degrees

Resolution: 4440x3108

Locations: Northern Cross Observatory, Fenton, MI, United States

Data source: Backyard

Description

From Wikipedia:

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000[3] to 400,000[citation needed] years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

Data:

August 29/30 2020 with August 16/17 data.

Out of 117 frames, 84 x 300 seconds used

Two sets of 50 flats used, one for each night due to slight configuration changes.

24 Darks

10" f/8 RC

Losmandy G11 mount

ZWO asi071mc PRO @ 300 gain and 0C temp (OSC) No Filters

Stacked in DSS

Processed in PI

Cosmetic cleanup in Gimp 2

DeNoise AI

Comments

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NGC 6888 - Crescent Nebula, 



    
        

            Doug_Bock