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Contains:  North America nebula, NGC 7000, NGC 6997
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NGC7000 North America Nebula, 





    
        

            Jerry Macon
NGC7000 North America Nebula

NGC7000 North America Nebula

Technical card

Resolution: 3524x5400

Dates:Aug. 25, 2015

Frames:Hutech HEUIBII: 40x300" ISO25600 -11C

Integration: 3.3 hours

Flats: ~30

Bias: ~21

Avg. Moon age: 10.03 days

Avg. Moon phase: 76.69%

Bortle Dark-Sky Scale: 3.00

Mean FWHM: 2.00

Temperature: 16.00

Astrometry.net job: 1014603

RA center: 314.709 degrees

DEC center: 44.457 degrees

Pixel scale: 1.882 arcsec/pixel

Orientation: 179.980 degrees

Field radius: 1.685 degrees

Locations: Dark Star Observatory, Taos, New Mexico, United States

Description

The Canon 6D is modded and cooled to 46F below ambient.

This third 'Final' revision has decreased the brightness of the stars. So many stars in this image. I think it is better with toned down stars.

This is the first target I imaged from my new observatory, the building was finished July 2015 and the mount and scopes installed in August.
This second revision reflects improvements in my processing technique with PixInsight.
At the time I thought that I would get a better SNR (signal to noise ratio) using the high ISO of 25,600. Since then I have learned that only reduces the dynamic range and makes the SNR worse. See this link for a great discussion of this: http://www.clarkvision.com/articles/iso/
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Like many glowing reddish-pink nebula, the North America Nebula is an HII region (pronounced “H-two”), a large cloud of hydrogen that’s ionized by hot stars embedded within the nebula. Astronomers once thought the star brilliant Deneb set this nebula aglow, but the very hot 6th-magnitude star HD 199579, one of the many stars buried within the nebula, is the culprit.

Once you see the nebula, look carefully for detail. Mexico and Florida are the faintest regions of the nebula, while Central America and Canada are the easiest to see. The coasts of the “continent” are also well defined. Look also for concentrations of stars around Washington State and the midwestern U.S. These are the open star clusters Collinder 428 and NGC 6997, respectively.

It lies about 1800 light years away and spans some 50 light years.
The nebula was discovered by William Herschel on October 24, 1786, from Slough, England.
(Wikipedia)

Comments

Author

jmacon
Jerry Macon
License: None (All rights reserved)
5611
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Revisions

  • NGC7000 North America Nebula, 





    
        

            Jerry Macon
    Original
  • Final
    NGC7000 North America Nebula, 





    
        

            Jerry Macon
    D

Sky plot

Sky plot

Histogram

NGC7000 North America Nebula, 





    
        

            Jerry Macon