Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  The star 2Cyg  ·  The star 9Cyg  ·  The star φCyg
Getting plate-solving status, please wait...
SNR G65.3+5.7, 



    
        

            Charles Bracken
SNR G65.3+5.7
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Getting plate-solving status, please wait...
SNR G65.3+5.7, 



    
        

            Charles Bracken
SNR G65.3+5.7
Powered byPixInsight

Acquisition details

Frames:
Astrodon 5nm Ha: 264×300(22h)
Astrodon 5nm OIII: 226×300(18h 50′)
Integration:
40h 50′

Basic astrometry details

Astrometry.net job: 5313055

RA center: 19h31m53s.3

DEC center: +31°1330

Pixel scale: 3.961 arcsec/pixel

Orientation: 1.878 degrees

Field radius: 3.099 degrees

Resolution: 4574x3287

File size: 6.7 MB

Data source: Backyard

Description

This is an extremely challenging object, as it is not only very faint, but very large, spanning 5.5° in RA and 3.3° in declination. Even with an APS-C sensor (ASI2600MM) at 387 mm focal length, it took a four-panel mosaic to cover it.  The size of the full moon is shown at upper right for a sense of scale. 

It lies at the head of Cygnus the swan, on the border of Vulpecula.  Here, I’ve mapped H-alpha to red and [OIII] to blue.  The whole object is extremely dim in both channels—this image took 41 hours of exposure. G65.3+5.7 was discovered by Gull, Kirshner, and Parker in 1977, though Sharpless cataloged the fragments brightest in H-alpha as Sh2-91, Sh2-94, and Sh2-96.  Gull et al estimated it to be about 230 light years in diameter and 4000 light years away. In 2002, it’s age was estimated to be about 27,500 years old.At first, I thought the deep red star near the center was an error, but it turns out to be planetary nebula PK064+05.1. This is reduced-size version, 25% the size of the original.

Comments

Sky plot

Sky plot

Histogram

SNR G65.3+5.7, 



    
        

            Charles Bracken