SH2-308 (Chris Plonski)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · The star Udra (ο1 CMa

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SH2-308

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SH2-308

SH2-308 is commonly known as the Dolphin Nebula or the Cosmic Bubble Nebula. It is located in in the constellation of Canis Major (The Big Dog). It is an HII region seen here glowing red due to the ionized hydrogen gas in its makeup. The main blue area is made up of ionized oxygen gas that is expanding rapidly due to the intense solar winds coming from the bright blue central star. This is a "Wolf-Rayet" star that is many times the mass of our sun and is in a pre-supernova stage of its evolution. Its impending supernova explosion will consume the bubble and surrounding area. The distance from Earth is a contested number ranging from 1900 to 5800 light years away, but largely considered to be 4350 light years away making the bubble about 60 light years in diameter. Quite a large dolphin head!

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	Distinct awarded users	Total awarded images
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced failed
Started	...
Astrometry.net job	6534043
PixInsight job	DLG5EMPUHALVOAPAMLIYHOA81CIXBJ70
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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SH2-308

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SH2-308

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