Celestial 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

Acquisition details

Dates:
June 1, 2014 ·  June 12, 2020 ·  June 27, 2020 ·  June 28, 2020 ·  July 20, 2020 ·  July 28, 2020 ·  Aug. 21, 2020 ·  Aug. 26, 2020
Frames:
104×30(52′) ISO1600
372×30(3h 6′) ISO800
Astronomik EOS Clip CLS: 492×30(4h 6′) ISO1600
Astronomik EOS Clip CLS: 280×30(2h 20′) ISO800
Astronomik H-alpha 12nm CCD Clip-Filter EOS: 471×30(3h 55′ 30″) ISO800
Astronomik OIII 12nm CCD Clip-Filter EOS APS-C: 682×30(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: 20h33m25s.2

DEC center: +60°2356

Pixel scale: 1.131 arcsec/pixel

Orientation: 0.477 degrees

Field radius: 0.980 degrees

Resolution: 5202x3452

File size: 9.4 MB

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