GK Persei (Gary Imm)

Celestial hemisphere: Northern · Constellation: Perseus (Per)

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GK Persei

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GK Persei

This object is a rarely imaged nova and faint remnant located 1500 light years away in the constellation of Perseus at a declination of +44 degrees. The remnant is 1.5 arc-minutes in diameter in our apparent view, which corresponds to a span of 0.7 light years. The nova is the star GK Persei seen in the center of the remnant. It is an orange sub-giant variable star whose current magnitude is 13.

The nova exploded on Feb. 23, 1901 and was detected a year later. The nova reached a maximum of 0.2 magnitude, one of the brightest novae recorded. Scientists believe that this nova was created when a white dwarf explosion blew away the outer layers of a gas envelope that had accumulated on its surface. This gas envelope had been pulled from its orbiting companion star. The nova still undergoes minor outbursts of about 3 magnitudes every few years.

The nova remnant is not quite symmetrical, which is unusual. It is believed that the interstellar medium is active in this area and is impacting the shape of this remnant.

ZWO ASI183/QHY183
The refractors!
Cloudy Nights
Narrowband imaging

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
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Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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	2912343
PixInsight job	HGTITAEZLXDN9KWYNK2H5N0LG43NKAFF
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h31m12s.260
RA (top/left)	03h32m16s.401
RA (top/right)	03h30m10s.562
RA (bottom/right)	03h30m07s.940
RA (bottom/left)	03h32m13s.189

Dec (center)	+43°54′13″.13
Dec (top/left)	+44°02′13″.16
Dec (top/right)	+44°02′55″.66
Dec (bottom/right)	+43°46′10″.89
Dec (bottom/left)	+43°45′28″.55

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GK Persei

GK Persei

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GK Persei

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