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Contains:  NGC 6946
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NGC 6946 The Fireworks Galaxy, 





    
        

            Barry Wilson
NGC 6946 The Fireworks Galaxy

NGC 6946 The Fireworks Galaxy

Technical card

Resolution: 3274x2580

Dates:July 6, 2019

Frames:
Astrodon E-Series Blue filter: 36x300" bin 1x1
Astrodon E-Series Green filter: 36x400" bin 1x1
Astrodon E-Series Red filter: 36x370" bin 1x1
Astrodon Ha 3nm: 18x1200" bin 1x1
Astrodon Luminance E-Series: 44x600" bin 1x1

Integration: 24.0 hours

Avg. Moon age: 4.16 days

Avg. Moon phase: 18.38%

Astrometry.net job: 2821419

RA center: 308.715 degrees

DEC center: 60.143 degrees

Pixel scale: 0.743 arcsec/pixel

Orientation: 89.486 degrees

Field radius: 0.430 degrees

Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura

Description

From Wikipedia: "NGC 6946 also known as the Fireworks Galaxy is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus. Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs[2], similar to the distance of M101 (NGC 5457) in the constellation Ursa Major.[3] Both were once considered to be part of the Local Group.[4] but are now known to be among the dozen bright spiral galaxies near the Milky Way but beyond the confines of the Local Group.[5] NGC 6946 lies within the Virgo Supercluster.[6]

Discovered by William Herschel on 9 September 1798, this well-studied galaxy has a diameter of approximately 40,000 light-years[dubious – discuss] , about one-third of the Milky Way's size,[7] and it contains roughly half the number of stars as the Milky Way. The galaxy is heavily obscured by interstellar matter as it lies quite close to the galactic plane of the Milky Way. Due to its prodigious star formation it has been classified as an active starburst galaxy."

It was quite confusing how best to present this image when establishing a colour balance, PixInisght definitely gave the image a reddish cast after PCC however web references had a variety of balances: I opted to leave a somewhat reddish cast but I hope not an overly dominant one, a balance that reflects our line of sight view through Cepheus' dusty environs. I certainly found the luminance channel gave hints of dust that careful use of DBE retained. Finally, Ha data helped bring the fireburst galaxy to life showing the abundant HII emission star forming clusters.

Data acquisition: Barry Wilson & Steve Milne
Processing: Barry Wilson

Comments

Author

Barry-Wilson
Barry Wilson
License: None (All rights reserved)
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NGC 6946 The Fireworks Galaxy, 





    
        

            Barry Wilson

In these public groups

Entre Encinas y Estrellas (e-EyE)