M2 (Kurt Zeppetello)

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

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M2

Link: http://kurt-zeppetello.blogspot.com/2016/09/m2-globular-cluster.html

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M2

Link: http://kurt-zeppetello.blogspot.com/2016/09/m2-globular-cluster.html

M2 is a globular cluster in the constellation of Aquarius. It contains about 150,000 stars, including 21 known variable stars. M2 is about 37,500 light-years distant from Earth. At 175 light-years in diameter, it is one of the larger globular clusters known and can be seen with binoculars orthe naked eye under dark skies. It is 13 billion years old and one of the older globular clusters in the Milky Way Galaxy (source: wikipedia).

This was the first celestial image I took with my newly modified Canon EOS Rebel T3i (600D). The modification work was done by Hap Griffin at Imaging Infinity. Hap has several options available for DSLR modification. I chose to have the IR Filter Replaced with the Astrodon UV/IR block filter. This modification passes hydrogen-alpha light but blocks IR. This modification will be especially noticeable on images of nebulae with high ionized hydrogen concentration, however, it does allow a bit more light to pass through so other images will benefit as well.

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Final
B

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Globular Clusters
Messier Objects

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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
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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
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
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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	1258809
PixInsight job	XM3KLRRUQ5MDVZI9SNMUDOYBJGXJWG36
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h33m28s.10
RA (top/left)	21h35m40s.21
RA (top/right)	21h31m28s.77
RA (bottom/right)	21h31m15s.76
RA (bottom/left)	21h35m27s.31

Dec (center)	-00°50′45″.0
Dec (top/left)	-00°29′59″.2
Dec (top/right)	-00°25′35″.4
Dec (bottom/right)	-01°11′33″.7
Dec (bottom/left)	-01°15′57″.3

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