NGC 3621 (Jochen Maes)

Celestial hemisphere: Southern · Constellation: Hydra (Hya) · Contains: NGC 3621

NGC 3621

Link: https://www.jochenmaes.com/astronomy/galaxies?itemId=h2lnleqo8ri7qupsaqzwud0k1qtaqa

NGC 3621

Link: https://www.jochenmaes.com/astronomy/galaxies?itemId=h2lnleqo8ri7qupsaqzwud0k1qtaqa

NGC 3621 is a spiral galaxy in the Hydra constellation, around 22 million light years from earth.

This galaxy is a so-called “pure-disk” galaxy. Many galaxies have a “bulge” at their center. Very simply put, their central region is populated by a very tight density of stars which shows as a bulging glow when viewed from our vantage point. This galaxy doesn’t have that (and is hence labeled as “pure-disk”). So why is that?

As with many things in astronomy, we’re not quite sure yet. However, the best explanation we have so far is that these central bulges are actually the result of galaxies interacting gravitationally with another galaxy during their lifespan; causing all sorts of turmoil resulting in the central regions getting more densely populated. This galaxy (and various other ones like it for that matter) would quite simply not have been involved in such an encounter.

Image acquisition details:

23x900” Luminance
14x900” HA
20x900" Red
22x900" Green
21x900" Blue

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	Basic success
Started	...
Astrometry.net job	7501518
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 3621

NGC 3621

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NGC 3621

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