Crescent Nebula NGC 6888 HOORGB (Paul O’Brien)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · HD192003 · HD192020 · HD192102 · HD192163 · HD192182 · HD192303 · HD192361 · HD192444 · HD228139 · HD228152 · HD228153 · HD228185 · HD228186 · HD228198 · HD228205 · HD228243 · HD228261 · HD228262 · HD228289 · HD228290 · HD228304 · HD228311 · HD228324 · HD228376 · LBN 203 · NGC 6888 · Sh2-105

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Crescent Nebula NGC 6888 HOORGB

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Crescent Nebula NGC 6888 HOORGB

A frequently imaged target, the Crescent Nebula, an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. The nebula's structure is formed by a fast stellar wind from a Wolf-Rayet star colliding with the slower stellar particles ejected from the star in its distant past 400,000 years ago as a red giant. One shell and two shock waves were produced from this collision, one moving outward and one moving inward. The surface temperatures of this star class range from 35,000-380,000 degrees F, hotter than almost all other kinds of stars.

This image is the result of a collaboration project between me and my friend in Tucson, Alan Rockowitz. We gathered 22 hours of Ha, OIII and RGB star data with a TEC 140ED (QHY600M) and iStar 140mm Phantom (ZWO 2600M) on 10Micron GM1000 mounts from the Tucson and Seattle area. We also collected SII data but didn't like the way the SHO palette turned out. Ha and OIII is very strong in this nebula so an effort was made to blend/balance the data to reflect this fact. Raw data from our joint efforts was combined and processed with PI.

Pacific Northwest Astrophotographers
QHYCCD QHY600 Images
TEC140 Refractor

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Status	Advanced success
Started	...
Astrometry.net job	8450025
PixInsight job	9WM43LRFNOHVG6G04UGI53AXHKTB47A6
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h12m09s.535
RA (top/left)	20h10m42s.790
RA (top/right)	20h10m52s.189
RA (bottom/right)	20h13m35s.270
RA (bottom/left)	20h13m27s.718

Dec (center)	+38°20′10″.28
Dec (top/left)	+38°41′22″.80
Dec (top/right)	+37°57′40″.67
Dec (bottom/right)	+37°58′55″.52
Dec (bottom/left)	+38°42′37″.80

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Crescent Nebula NGC 6888 HOORGB

Crescent Nebula NGC 6888 HOORGB

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Crescent Nebula NGC 6888 HOORGB

Crescent Nebula NGC 6888 HOORGB

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