Regulus in Leo (Matt Harbison)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: 32 alf Leo · IC 591 · Regulus · The star Regulus (αLeo)

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Regulus in Leo

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Regulus in Leo

Regulus (the star) in the constellation Leo is accompanied in view by the galaxy UGC 5470. This tiny blue fuzz you see is a dwarf galaxy- Leo 1 or UGC5470/PGC 29488, and is sometimes called the "Regulus Dwarf".

Regulus, while being a blue/white main sequence star like our own, rotates rapidly taking only 15-16 earth hours to complete a rotation. This increased rotation and it's size (and possibly other forces unknown to me) have caused it to become almost egg-shaped. While filling my cameras sensor, appearing to be one star, it is actually at least a quadruple system with four stars in it's grasp. It is roughly 3.5 times the size of Sol and has a luminosity of 240 times more. It is 77.5 light years from the Earth.

I first observed this star in the spring of 2017 with my friends and fellow Barnard Astronomical Society of Chattanooga members, Ralph McConnell and Harold Harris while participating in one of Ralph's monthly star hopping challenges from the Barnard Astronomical Society of Chattanooga’s monthly newsletter. I've just now gotten around to turning the camera on it for a few months.

Captured in Marathon, Texas at MARIO Telescopes LLC.

Barnard Astronomical Society of Chattanooga
QHY Users Group

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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
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Star trails
Northern lights
Noctilucent clouds
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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
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Traveller
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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	3527180
PixInsight job	WNE0BCLOHZ8KURN6FVYJS3371PQFXG2C
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h08m20s.69
RA (top/left)	10h04m42s.17
RA (top/right)	10h12m13s.41
RA (bottom/right)	10h12m00s.25
RA (bottom/left)	10h04m26s.55

Dec (center)	+11°58′10″.5
Dec (top/left)	+11°20′44″.9
Dec (top/right)	+11°26′20″.3
Dec (bottom/right)	+12°35′29″.8
Dec (bottom/left)	+12°29′55″.5

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Regulus in Leo

Regulus in Leo

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Regulus in Leo

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