NGC 474 and NGC 470 (gmadkat)

Celestial hemisphere: Northern · Constellation: Pisces (Psc) · Contains: NGC 470 · NGC 474

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NGC 474 and NGC 470

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NGC 474 and NGC 470

NGC 474 is a large peculiar elliptical galaxy 100 million light years away in Pisces. It interacts with NGC 470 the spiral galaxy to the left.
NGC 474 has an unusual and complex series of shell layers and tidal streams that surround the central part of the galaxy and its core.
The origin of the structure is postulated that the tidal features come from the accretion of a spiral galaxy that collided around 1.3 billion years ago and merged around 900 million years ago.
Volume 660, April 2022 of AANDA in the Extragalactic Astronomy section theorizes that based on the phase-space wrapping model by Quinn the formation of the shells began by a nearly radial minor or intermediate merger of the two galaxies. The large galaxy disrupted the smaller secondary galaxy by tidal forces causing the release of stars which moved out at various radial velocities. The orbital period and position was then determined by pericentric velocities. In effect then the shells are density waves made of stars near the epicenters of their orbits and expand over time.
Imaged in LRGB on the Planewave CDK 1000 at Observatorio El Sauce, Chile

Preprocessed masters for RGB and Lum deconvolution provided by Mike Selby at throughlightandtime.com
Processed by gmadkat using Pixinsight, Photoshop and CaRon deconvolution.

Uploaded the full resolution version to see the smaller galaxies in the field as well, they are fascinating!

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Status	Advanced failed
Started	...
Astrometry.net job	6252130
PixInsight job	EGSYEE8SK6FRX2EG64V2TGI3K2KXOKFM
PixInsight queue size	n/a
PixInsight stage	DOWNLOADING_IMAGE

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