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Contains:  Crescent nebula, NGC 6888
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NGC 6888 - The Crescent Nebula in Hydrogen Alpha, 


            Hap Griffin
NGC 6888 - The Crescent Nebula in Hydrogen Alpha

NGC 6888 - The Crescent Nebula in Hydrogen Alpha

Technical card

Imaging telescope or lens:Orion Newtonian 10" f/5

Imaging camera:QSI 583wsg

Mount:apt1200gto AP1200

Software:CCD Autopilot 5

Resolution: 1200x897

Dates:Sept. 11, 2009

Frames: 5x1200"

Integration: 1.7 hours

Avg. Moon age: 21.51 days

Avg. Moon phase: 56.76% job: 1512684

RA center: 303.024 degrees

DEC center: 38.351 degrees

Pixel scale: 1.972 arcsec/pixel

Orientation: 176.631 degrees

Field radius: 0.410 degrees

Locations: ImagingInfinity Observatory, Bethune, SC, United States


Powerful radiation winds blowing from the massive star, HD 192163 in the center of this photograph, created this nebula. About 400,000 years ago, HD 192163 expanded enormously to become a red giant and ejected its outer layers. 200,000 years later, the intense radiation from the exposed hot, inner layer of the star began pushing gas away at speeds in excess of 3 million miles per hour. Information gathered by the Chandra X-Ray satellite leads researchers to predict that HD 192163 will explode as a supernova in approximately 100,000 years.

NGC 6888 lies at a distance of 5000 light-years.

This image was captured through a narrowband filter admitting only a narrow slice of spectrum around the wavelength of glowing hydrogen. Thus it is a monochrome (single color) image displayed as shades of grey.



Hap Griffin
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6888 - The Crescent Nebula in Hydrogen Alpha, 


            Hap Griffin