Omega Centauri, NGC 5139 (Frank Alvaro)

Celestial hemisphere: Southern · Constellation: Centaurus (Cen) · Contains: HD115989 · HD116197 · HD116337 · HD116354 · HD116586 · HD116649 · HD116663 · HD116789 · HD116861 · HD116980 · HD117054 · HD117193 · HD117313 · HD117484 · HD117618 · HD117685 · HD117721 · NGC 5139 · Omega Centauri · omega Cen

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Omega Centauri, NGC 5139

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Omega Centauri, NGC 5139

Omega Centauri (ω Cen, NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677. Located at a distance of 17,090 light-years (5,240 parsecs), it is the largest-known globular cluster in the Milky Way at a diameter of roughly 150 light-years. It is estimated to contain approximately 10 million stars, and a total mass equivalent to 4 million solar masses, making it the most massive-known globular cluster in the Milky Way.

Omega Centauri is very different from most other galactic globular clusters to the extent that it is thought to have originated as the core remnant of a disrupted dwarf galaxy. The stars in the core of Omega Centauri are so crowded that they are estimated to average only 0.1 light-year away from each other. The internal dynamics have been analysed using measurements of the radial velocities of 469 stars. The members of this cluster are orbiting the centre of mass with a peak velocity dispersion of 7.9 km s−1. (Wikipedia)

Australian Astrophotographers
Southern Hemisphere Astro

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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
Extremely wide field
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	5915762
PixInsight job	0Q3IUEDVBCQM0GWEVDD2U2FDE9YZ4X45
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h26m58s.71
RA (top/left)	13h26m14s.80
RA (top/right)	13h19m24s.92
RA (bottom/right)	13h27m44s.78
RA (bottom/left)	13h34m20s.76

Dec (center)	-47°28′16″.3
Dec (top/left)	-46°04′05″.9
Dec (top/right)	-48°04′44″.1
Dec (bottom/right)	-48°52′19″.2
Dec (bottom/left)	-46°49′55″.1

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Omega Centauri, NGC 5139

Omega Centauri, NGC 5139

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Image Index:

Contribution Index (beta):

Omega Centauri, NGC 5139

Omega Centauri, NGC 5139

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