NGC 520 (Tom Harrison)

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

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NGC 520

Link: http://www.manoprietoobservatory.com/gallery/galaxies/181

NGC520 is a pair of interacting galaxies seen in the direction of the Constellation Pices between 100-120 Million Light-Years distant. The galactic "train wreck" of the two galaxies, whose disks have merged, form a very disturbed morphology with heavy star formation and tidal tails of newly formed stars, dust and galactic debris spread thousands of light-years in every direction surrounding the merger. The pair began their merger about 300,000,000 years ago, and the present disk is about 100,000 light-years across. The galactic nuclei have not yet coalesced. There is also a tidal tail connecting NGC520 to the faint galaxy on the right of the image, UGC957. This could be a preview of what the situation might look like when the Milky Way collides with the Andromeda Galaxy some 5 billion years from now.

Object: NGC520 Galaxy

Distance: 100-120 Million Light-Years

Magnitude: 12

Date: December 2011

Place: Fort Davis, TX

Exposure Details: LRGB:310:120:140:170 unbinned

Processing: MaxIm DL, CCDInspector, CCDSoft, Photoshop CS3, various plug-ins

Optics: RCOS 12.5" Truss

Focal Length: 2808mm at f9

Mount: Paramount ME Robotic GEM

Camera: STL6303E

Focuser: RCOS

Guiding: Off-Axis using SBIG Guide Camera

Filters: Tru-Balance LRGB 2" Gen II

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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
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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
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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	6433353
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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