NGC 4567 4568 Siamese Twins (apothegary)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: IC 3510 · IC 3578 · NGC 4564 · NGC 4567 · NGC 4568 · Siamese Twins

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NGC 4567 4568 Siamese Twins

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NGC 4567 4568 Siamese Twins

The Siamese Twins, also known as the Butterfly Galaxies, are a pair of colliding unbarred spiral galaxies located in Virgo constellation. The galaxies lie at a distance of 59.4 million light years and are members of the Virgo Cluster. They have an apparent magnitude of 10.9 and an absolute magnitude of -13.3.

The Siamese Twins are still in an early phase of colliding and merging with each other based on the studies of the galaxies’ distributions of neutral and molecular hydrogen. They are called the Siamese Twins because they appear almost identical in structure and shape (their inclination to our line of sight notwithstanding) and are connected. The galaxies were once suspected of being just a chance alignment because there was no evidence of distorted structure or tidal filaments, but more recent studies, especially in the infrared, showed that they were indeed in the process of colliding, with the highest rate of star formation occurring in their overlap region.

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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	Advanced success
Started	...
Astrometry.net job	3591365
PixInsight job	EHFTSLIRNQ5NY9V6ANCGPDKAO74HXAF5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h36m29s.74
RA (top/left)	12h39m04s.11
RA (top/right)	12h35m05s.61
RA (bottom/right)	12h33m56s.10
RA (bottom/left)	12h37m53s.31

Dec (center)	+11°13′50″.1
Dec (top/left)	+11°24′03″.3
Dec (top/right)	+11°47′12″.9
Dec (bottom/right)	+11°03′37″.7
Dec (bottom/left)	+10°40′24″.9

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NGC 4567 4568 Siamese Twins

NGC 4567 4568 Siamese Twins

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NGC 4567 4568 Siamese Twins

NGC 4567 4568 Siamese Twins

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