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

Technical card

Imaging telescopes or lenses: GSO 10" f/8 RC Truss

Imaging cameras: ZWO ASI071C Pro

Mounts: Losmandy G11

Guiding telescopes or lenses: GSO 10" f/8 RC Truss

Guiding cameras: ZWO ASI071MC-Cool

Software: SGPRO  ·  PixInsight 1.8.5 Ripley  ·  DeepSkyStacker 4.1.1 64bit  ·  Optec Inc. FocusLock  ·  PHD2

Accessory: Innovations Foresight ONAG SC


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

Sky plot

Sky plot

Histogram

NGC 6888 - Crescent Nebula, 



    
        

            Doug_Bock