WR 134 and associated nebulae - RGBHO (Rainer Raupach)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD191493 · HD191494 · HD191611 · HD191765 · HD191917 · HD192103 · HD228063 · NGC 6883

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WR 134 and associated nebulae - RGBHO

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WR 134 and associated nebulae - RGBHO

WR 134 (or HD 191765) is a Wolf-Rayet star located at a distance of approximately 6000 Lyrs in the constallation of Cygnus. Due to the very high surface temperature of about 63000K (ten times hotter than the sun, and ~400000 times as luminous) the maximum intensity of the black body radiation is in the far UV and, therefore, its visual color after star color calibration appears purple. In this RGBHO image color saturation of stars is chosen relatively high by intention in order to show this strange effect.

WR 134 is surrounded by beautiful but very faint Ha and OIII emission nebulae. The OIII nebula created by the stellar wind forms a "tattered" spherical structure around the star. The contrast of the ripples corresponds to a flux difference of only about 4 photons per pixel per hour with this setup! Therefore, the contrast after 22 hours of integration consists of only 100 photons difference (including photon noise standard deviation of ~sqrt(100)=10 photons). Obviously, a long exposure of >=20 hours is mandatory.

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Description: Reduced star intensity.

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Status	Advanced success
Started	...
Astrometry.net job	5034561
PixInsight job	177WY9BMY4BOBLAJ6LAAYZ5JWJTVT92G
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h10m13s.980
RA (top/left)	20h12m58s.770
RA (top/right)	20h07m29s.858
RA (bottom/right)	20h07m30s.552
RA (bottom/left)	20h12m56s.393

Dec (center)	+36°12′24″.90
Dec (top/left)	+36°34′29″.21
Dec (top/right)	+36°34′45″.96
Dec (bottom/right)	+35°50′12″.40
Dec (bottom/left)	+35°49′50″.34

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WR 134 and associated nebulae - RGBHO

WR 134 and associated nebulae - RGBHO

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WR 134 and associated nebulae - RGBHO

WR 134 and associated nebulae - RGBHO

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