M15 Globular Cluster (Richard Pattie)

Celestial hemisphere: Northern · Constellation: Pegasus (Peg) · Contains: M 15 · NGC 7078

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M15 Globular Cluster

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M15 Globular Cluster

M15 is a globular cluster in the constellation Pegasus. It is 33,000 ly distant and, at 12 billion years old, is the oldest known globular cluster. At magnitude 6.2, M15 approaches naked eye visibility under good conditions and can be observed with binoculars or a small telescope, appearing as a fuzzy star. M15 is approximately 180 ly in diameter and contains 100,000 stars. The cluster is notable for containing a large number of variable stars (112) and pulsars (8), including one double neutron star system. (Source: adapted from Wikipedia)

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I captured this at ISO 1600 which caused diagonal streaks in the background. Mike Unsold of ImagesPlus showed me how to get rid of the streaks. Next time I try M15 it will be at ISO 400.

With my combination of telescope, camera and light pollution, this target is really too small to reveal much detail.

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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	Basic success
Started	...
Astrometry.net job	381714
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M15 Globular Cluster

M15 Globular Cluster

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M15 Globular Cluster

M15 Globular Cluster

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