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Starless NGC 7000 & IC 5070, 





    
        

            Douglas J Struble

Starless NGC 7000 & IC 5070

Technical card

Resolution: 4292x3433

Dates:Aug. 2, 2018Aug. 3, 2018Aug. 4, 2018

Frames:
Astrodon Ha 5nm: 78x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 83x240" (gain: 139.00) -20C bin 1x1
Astrodon SII 3nm: 96x240" (gain: 139.00) -20C bin 1x1

Integration: 17.1 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 20.90 days

Avg. Moon phase: 62.92%

Bortle Dark-Sky Scale: 6.33

Astrometry.net job: 2186730

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard

Description

I don't always think working on a starless version is a good fit, but there is enough going on in this data set for it to work I believe.

The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus. The remarkable shape of the emission nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico. The North America Nebula is large, covering an area of more than four times the size of the full moon; but its surface brightness is low, so normally it cannot be seen with the unaided eye. The North America Nebula and the nearby Pelican Nebula, (IC 5070) are in fact parts of the same interstellar cloud of ionized hydrogen. The distance of the nebula complex is though to be approx 1800 light years away.

The Pelican Nebula (also known as IC 5070 and IC 5067) is an H II region associated with the North America Nebula in the constellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name. The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a molecular cloud filled with dark dust.

The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different.

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dugstruble
Douglas J Struble
License: None (All rights reserved)
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Starless NGC 7000 & IC 5070, 





    
        

            Douglas J Struble