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Sh2-308 (Wolf-Rayet Star)


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Sh2-308
Wolf-Rayet Star (ウォルフ・ライエ星)
WR 6 (Wolf-Rayet Star 6)


別名 (Other names)
Sharpless 308, Sh 2-308, RCW 11

星座 (Constellation)
おおいぬ座 (CMa) (Canis Major)

座標 (Coordinates)
(234.76°, -10.09°)

距離 (Distance)
5,200光年 (5,200 light-years)

Sh2-308 (WR 6) is a Wolf-Rayet star located 5,200 light years from the Earth in the constellation Canis Major.

Sh2-308 (Wolf-Rayet Star) : Picture

Sharpless 308
Sharpless 308: Star Bubble
(C) Jeff Husted
Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 2-308 it lies some 5,200 light-years away toward the constellation of Canis Major and covers slightly more of the sky than a Full Moon. That corresponds to a diameter of 60 light-years at its estimated distance. The massive star that created the bubble, a Wolf-Rayet star, is the bright one near the center of the nebula. Wolf-Rayet stars have over 20 times the mass of the Sun and are thought to be in a brief, pre-supernova phase of massive star evolution. Fast winds from this Wolf-Rayet star create the bubble-shaped nebula as they sweep up slower moving material from an earlier phase of evolution. The windblown nebula has an age of about 70,000 years. Relatively faint emission captured in the expansive image is dominated by the glow of ionized oxygen atoms mapped to violet hues.

Sharpless 308
Sharpless 308
(C) Don Goldman

Sh2-308 (Wolf-Rayet Star)
Sh2-308 (Wolf-Rayet Star)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This small nebula is surrounded by a number of Sharpless objects SH2-304, Sh2-303, and SH2-310 which is the largest. This object is very faint and will take a long exposure in any filter used. The color image of this does not use any narrowband filters because I wanted to show the colors you can expect with green covering most of it. The brightest area is the bottom loop and this might be a good area for larger telescopes to center on. Sh2-308 does not respond much at all in Sulfur II but better in Hydrogen-Alpha. However, the Oxygen III is by far the strongest channel. So I used H-Alpha for red, OIII for green, and SII for blue.

Sharpless 308 Sharpless 308
Sharpless 308
(C) Jeff Husted
Sharpless 308
(C) Don Goldman
Sh2-308 Sh2-308
Sh2-308 (Wolf-Rayet Star)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
Sh2-308 (Wolf-Rayet Star)
(C) http://galaxymap.org/
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