Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Fireworks Galaxy  ·  NGC 6939  ·  NGC 6946
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NGC 6946: emphasizing star-forming H II regions, 



    
        

            gigiastro
NGC 6946: emphasizing star-forming H II regions
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NGC 6946: emphasizing star-forming H II regions

Getting plate-solving status, please wait...
NGC 6946: emphasizing star-forming H II regions, 



    
        

            gigiastro
NGC 6946: emphasizing star-forming H II regions
Powered byPixInsight

NGC 6946: emphasizing star-forming H II regions

Technical card

Imaging telescopes or lenses: Samyang 135mm f/2  ·  Canon EF 400mm f/5,6L USM

Imaging cameras: Canon EOS 60Da

Mounts: iOptron ZEQ25GT  ·  AstroTrac TT 320

Software: PixInsight  ·  DeepSkyStacker 3.3.4  ·  Noel Carboni's StarSpikes Pro 4  ·  Elements Photoshop

Filters: Astronomik EOS Clip CLS  ·  Astronomik OIII 12nm CCD Clip-Filter EOS APS-C  ·  Astronomik H-alpha 12nm CCD Clip-Filter EOS


Dates:June 1, 2014June 12, 2020June 27, 2020June 28, 2020July 20, 2020July 28, 2020Aug. 21, 2020Aug. 26, 2020

Frames:
104x30" (52') ISO1600
372x30" (3h 6') ISO800
Astronomik EOS Clip CLS: 492x30" (4h 6') ISO1600
Astronomik EOS Clip CLS: 280x30" (2h 20') ISO800
Astronomik H-alpha 12nm CCD Clip-Filter EOS: 471x30" (3h 55' 30") ISO800
Astronomik OIII 12nm CCD Clip-Filter EOS APS-C: 682x30" (5h 41') ISO1600

Integration: 20h 30"

Darks: 11

Flats: 28

Flat darks: 9

Bias: 80

Avg. Moon age: 10.94 days

Avg. Moon phase: 36.25%

Bortle Dark-Sky Scale: 7.00

Mean SQM: 18.34

Temperature: 20.81


Basic astrometry details

Astrometry.net job: 3901163

RA center: 20h 33' 25"

DEC center: +60° 23' 56"

Pixel scale: 1.131 arcsec/pixel

Orientation: 0.477 degrees

Field radius: 0.980 degrees


Resolution: 5202x3452

Locations: Home, Mestre, Venezia, Italy

Data source: Backyard

Description

LRGB image.

An old picture of the "Fireworks Galaxy" NGC 6946, taken with a 400mm lens (L channel), "received"

H II regions from an image recorded with a focal length of 135mm (RGB channels).

When with narrow band filters, the 135mm lens was set at f/2, in all other cases at f/2.8

Comments

Sky plot

Sky plot

Histogram

NGC 6946: emphasizing star-forming H II regions, 



    
        

            gigiastro