M30 (NGC 7099) The Jellyfish Cluster in RGB (Ian Parr)

Celestial hemisphere: Southern · Constellation: Capricornus (Cap) · Contains: M 30 · NGC 7099 · The star 41 Cap

M30 (NGC 7099) The Jellyfish Cluster in RGB, Ian Parr

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M30 (NGC 7099) The Jellyfish Cluster in RGB

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M30 (NGC 7099) The Jellyfish Cluster in RGB

M30 is centred 27,100 light-years away from Earth and is about 93 light-years across with an estimated age is roughly 12.9 billion years and a mass of about 160,000 times the mass of the Sun. It is one of the highest density regions in the Milky Way galaxy. The cluster is following a retrograde orbit (against the general flow) through the inner galactic halo, suggesting that it was acquired from a satellite galaxy rather than forming within the Milky Way. The cluster has passed through a dynamic process called core collapse and now has a concentration of mass at its core of about a million times the Sun's mass per cubic parsec. The mass segregation process may have caused the central region to gain a greater proportion of higher mass stars, creating a colour gradient with increasing blueness toward the middle of the cluster.

I quite like the fact that the field is not drowning in background stars which helps the cluster pop out.

The is quite a late object for me and I had two sessions running into the wee hours a month apart. The seeing was terrible for the last session but Pixinsight WBP does an amazing job optimising the image from the best subs so I discarded only the very worst FWHM and eccentricity results.

23 Dec 2023 Updated to remove the 127is infernal reflections opposite the bright blue star and to utilise the latest BX 4 Library and GHS updates

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Distribution of astrophotographers

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	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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Extremely wide field
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
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	8952053
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M30 (NGC 7099) The Jellyfish Cluster in RGB

M30 (NGC 7099) The Jellyfish Cluster in RGB

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Image Index:

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M30 (NGC 7099) The Jellyfish Cluster in RGB

M30 (NGC 7099) The Jellyfish Cluster in RGB

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