The Crescent Nebula, NGC 6888 (Rick Veregin)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888

The Crescent Nebula, NGC 6888, Rick Veregin

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The Crescent Nebula, NGC 6888

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The Crescent Nebula, NGC 6888

The Crescent Nebula is a product of the very rare Wolf-Rayet star WR 136 (HD 192163) at its center. WR136 is 3.3 times larger than our Sun, 15 times more massive and 260,000 times more luminous, and has a surface temperature of about 70,000K, compared to our Sun at 5800K. As a super red giant WR 136 had lost some of its massive bulk of gas, then when it evolved to its WR phase it developed a ferocious stream of charged particles, a massive stellar wind, that collided with the gas around it to form a thin shell, that then broke into the bright clumps we see now. Ultraviolet light from WR136 causes the gas to glow, the red from hydrogen, the blue-green from oxygen. WR136 is thought to be heading to a supernova explosion within a few hundred thousand years, that I am sure would be a spectacular sight.

The crescent is large, but at a distance of 5,000 light-years very faint and difficult target from my light polluted sky. Using Startools as my workflow was impressive, even as a neophyte with the program, as when I looked at my raw image, I didn't think I was going to getting anything useful. Though I do wish I had even more subs, the image would be improved significantly with more S/N.

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Status	Advanced failed
Started	...
Astrometry.net job	3390929
PixInsight job	J8XFW9646B6SRK627N1049UWBJXIV4KI
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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The Crescent Nebula, NGC 6888

The Crescent Nebula, NGC 6888

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