Star RS Oph Nova (Dale A Chamberlain)

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: PGC 200838 · PGC 200896 · RS Oph · TYC5094-283-1 · TYC5094-61-1

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Star RS Oph Nova

Link: https://chamberlainobservatory.com/index.php/star-rs-oph-nova/

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Star RS Oph Nova

Link: https://chamberlainobservatory.com/index.php/star-rs-oph-nova/

RS Ophiuchi (RS Oph) is a recurrent nova system approximately 5,000 light-years away in the constellation Ophiuchus. In its quiet phase, it has an apparent magnitude of about 12.5. It has been observed to erupt in 1898, 1933, 1958, 1967, 1985, 2006, and 2021 and reached about magnitude 5 on average. A further two eruptions, in 1907 and 1945, have been inferred from archival data. The recurrent nova is produced by a white dwarf star and a red giant in a binary system. About every 15 years, enough material from the red giant builds upon the surface of the white dwarf to produce a thermonuclear explosion. The white dwarf orbits close to the red giant, with an accretion disc concentrating the overflowing atmosphere of the red giant onto the white dwarf.

On August 8, 2021, the Fermi Gamma-Ray Space Telescope corroborated optical observations made by K. Geary of a new outburst associated with RS Oph, with an estimated visual magnitude of 5.0. It reached a peak visual magnitude of approximately 4.6 the following day. (The lower the magnitude number, the brighter the object)

The first image was taken on August 11, 2021, shortly after the explosion. When I presented this image, I intended to come back a month later to see if it had diminished in brightness. On September 9, 2021, I took the second image and put them into this animated gif file. You can see the star is much less bright.

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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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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	Advanced success
Started	...
Astrometry.net job	5000244
PixInsight job	4AIXQKKWXXMLTG42FR1RT1Q6VHLTA52O
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	17h50m12s.374
RA (top/left)	17h49m27s.545
RA (top/right)	17h50m57s.352
RA (bottom/right)	17h50m57s.336
RA (bottom/left)	17h49m27s.623

Dec (center)	-06°42′18″.71
Dec (top/left)	-06°49′43″.32
Dec (top/right)	-06°49′45″.52
Dec (bottom/right)	-06°34′52″.70
Dec (bottom/left)	-06°34′52″.36

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Star RS Oph Nova

Star RS Oph Nova

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Star RS Oph Nova

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