NGC 6820, NGC 6823 & Sh2-86 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: NGC 6823

NGC 6820, NGC 6823 & Sh2-86

This image captures 3 objects in the constellation of Vulpecula at a declination of +23 degrees. Although this region is often referred to as NGC 6820, that is a misnomer. NGC 6820 is only the small white reflection nebula at the bottom right of the image. The central star cluster is NGC 6823 and the red emission nebula is Sh2-86.

A distance estimate for the small nebula is difficult. The star cluster and nebula are about 13,000 light years away.

The center of the open cluster, which is about 50 light-years across, is dominated in brightness by many young bright stars. The most dramatic feature in the image is the long trunk-like pillar of dust and gas protruding towards the star cluster. The pillar formed when surrounding gas and dust was eroded away by stellar winds and radiation from the brightest cluster stars, a process which is still ongoing. I like the bright ionization fronts on the lead edges of some of the pillars in the image.

Dark globules of gas and dust (Bok globules) are also visible in the nebula. Bok globules, named after the Dutch astronomer Bart Bok (1906-1983), who proposed their existence in the 1940′s, are dark clouds of dense cosmic dust and gas within which it is believed that star formation is taking place.

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Schmidt-Cassegrain Telescope (SCT) Imagers
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Open Star Clusters
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Sharpless2 Objects
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HII-Dominated Nebulae
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Astrometry.net job	3864687
PixInsight job	YFL1XWED1AJL8LB6U3TZTX3HKLAFU6WH
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PixInsight stage	PLATE_SOLVING_IMAGE

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NGC 6820, NGC 6823 & Sh2-86

NGC 6820, NGC 6823 & Sh2-86

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NGC 6820, NGC 6823 & Sh2-86

NGC 6820, NGC 6823 & Sh2-86

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