RCW 58 (jprejean)

Celestial hemisphere: Southern · Constellation: Carina (Car)

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RCW 58

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

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RCW 58

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

This beautiful nebula, RCW 58, in the southern constellation of Carina, surrounds and originates from a special type of star, a Wolf-Rayet star, WR40 (HD 96548, WN8).The bright blue star in the middle of the nebula is WR40. The nebula is referred to as a ring nebula, due to its open appearance. It is elongated north-south 9′ x 5′ based upon the red hydrogen alpha (H-a) data, but the blue-green oxygen (OIII) data extends its width to about 8′ east-west, where north is up. The nebula is expanding at a rate of 87 km/s. It has an unusual appearance with knots and a radial pattern shown by the red H-a data.

WR stars are huge, perhaps as large as 20 solar masses. They lose mass as they evolve at an incredible rate, producing very strong solar winds. They are very hot with temperatures ranging from 30,000 to 200,000 Kelvin. There are about 500 of these stars cataloged in our Milky Way Galaxy. They give off a large amount of ultraviolet (UV) radiation that ionizes the surrounding nebula and makes it glow, allowing us to see it. Most of these WR stars are thought to progress to a supernova explosion.

Processed from FITs subframes from Telescope Live using PixInsight.

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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	7928254
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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RCW 58

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