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Contains:  The star 68Cyg
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Sh2-119 Narrowband Natural

Technical card

Resolution: 4398x3325

Dates:Aug. 12, 2019Aug. 13, 2019Aug. 14, 2019Aug. 15, 2019

Frames:
Astrodon Ha 3nm-31mm: 280x180" (gain: 139.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 79x180" (gain: 139.00) -15C bin 1x1
Astrodon SII 3nm-31mm: 120x180" (gain: 139.00) -15C bin 1x1

Integration: 23.9 hours

Darks: ~35

Bias: ~45

Avg. Moon age: 13.39 days

Avg. Moon phase: 96.75%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 2873992

RA center: 319.593 degrees

DEC center: 43.762 degrees

Pixel scale: 2.303 arcsec/pixel

Orientation: 88.993 degrees

Field radius: 1.764 degrees

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard

Description

This is a wide-angle view of Sharpless 119 (Sh2-119), a large emission nebula covering about three degrees of the sky in the constellation Cygnus. My previous posting of Sh2-119 focused on the Bok globules and dark dust lanes of the object using a traditional HST palette (https://www.astrobin.com/421855/?nc=user). In this rendition, I am showing the entire nebula using much of the same narrowband data, but here with a combination of the three channels that yields a more “natural” color representation. Since the OIII data for this project were very poor, the perimeter of most frames blown out by light from the full Moon, I mixed the much stronger SII data with the OIII to retain structure in both the green and blue channels. After a fair amount of trial and error in PI Pixel Math, I was able to salvage a reasonable image if Sh2-119.

UPDATE
Van McComas astutely observed that the structure of this nebula, with the very light OIII signal in the core, gives the appearance of looking through a window at the cosmos beyond. So, since this object does not have a common name, how about we call it Window Nebula?

Comments

Author

GWLopez
Gary Lopez
License: None (All rights reserved)
3163
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Sh2-119 Narrowband Natural, 





    
        

            Gary Lopez