M2 (autonm) - AstroBin

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: M 2 · NGC 7089

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M2

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M2

Newcastle, UK

M2 is an *globular cluster of stars in the constellation of Aquarius.

M2 is one of the largest known globular clusters, larger telescopes will resolve individual stars, of which the brightest are of apparent magnitude 13.1.

M2 is about 55,000 light-years distant from Earth. At 175 light-years in diameter, it is one of the larger globular clusters known. The cluster is rich, compact, and significantly elliptical. It is 13 billion years old and one of the older globulars associated with the Milky Way galaxy.

M2 contains about 150,000 stars, including 21 known variable stars. Its brightest stars are red and yellow giant stars. M2 is part of the Gaia Sausage, the hypothesised remains of a merged dwarf galaxy.

*A globular cluster is a spherical collection of stars. Globular clusters are very tightly bound by gravity, giving them their spherical shapes and high concentrations of stars toward their centers. Their name is derived from Latin globulus—a small sphere. Globular clusters are occasionally known simply as globulars.

Please note: The following tables are updated every 24 hours.

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	5085501
PixInsight job	AN9CPUK2DRPHZ6EQDOT2WT75JGIUVAU2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h33m28s.90
RA (top/left)	21h37m01s.20
RA (top/right)	21h31m05s.40
RA (bottom/right)	21h29m55s.10
RA (bottom/left)	21h35m50s.74

Dec (center)	-00°49′18″.10
Dec (top/left)	-00°33′30″.3
Dec (top/right)	-00°06′44″.4
Dec (bottom/right)	-01°05′08″.2
Dec (bottom/left)	-01°31′54″.5

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Image Index:

Contribution Index (beta):

M2

M2

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Description

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