NGC 520 (Eddie Bagwell)

Celestial hemisphere: Northern · Constellation: Pisces (Psc) · Contains: NGC 520

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NGC 520

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NGC 520

NGC 520
Arp 157

Here we have a pair of colliding spiral galaxies about 105 million light-years away in the Pisces Constellation. They were discovered by William Herschel in 1784. Halton Arp called this the second-brightest disturbed galaxy in the sky.

Simulations indicate this object consists of two galactic disks that began interacting about 300 million years ago. The system is still in an early stage of its merger, showing two separate velocity systems in the spectra, and two small tails. Two galactic nuclei have been detected, and one is an H II nucleus.

The main galactic component is being viewed edge-on, making it fainter in the optical band. The secondary component is brighter but less massive than the main and is located to the east. A dark lane of dust separates the two. There are two dwarf objects located in the vicinity of this merging pair, and one of them is located in the eastern tidal tail – it may be the result of the interaction. Lastly, a large galactic wind is being driven by the starburst activity.

Thanks, Eddie

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Advanced success
Started	...
Astrometry.net job	8838227
PixInsight job	R79B9WFAIRL4BR3ZSVZ7K3BUURJF45Q2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h24m34s.684
RA (top/left)	01h24m11s.625
RA (top/right)	01h24m09s.380
RA (bottom/right)	01h24m57s.743
RA (bottom/left)	01h25m00s.411

Dec (center)	+03°47′29″.96
Dec (top/left)	+03°56′57″.69
Dec (top/right)	+03°38′26″.27
Dec (bottom/right)	+03°38′00″.21
Dec (bottom/left)	+03°56′31″.55

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NGC 520

NGC 520

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NGC 520

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