NGC 474

NGC 474 is a large lenticular galaxy in the constellation Pisces. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . Additionally, 13 non-redshift measurements give a similar mean distance of . It was discovered by German-British astronomer William Herschel on 13 December 1784.

NGC 474 is known to possess tidal shells and tidal tails, although their origins remain unclear. One possible explanation is that NGC 474 interacted with a galaxy several billion years ago.

Structure The origins of the spectacular tidal features around NGC 474 have been extensively studied, and some possible explanations have been published. The authors of one study argued that the tidal tails were formed because of a collision with a galaxy 2 billion years ago. The same study also stated that NGC 474 is absorbing gas from its neighbor, NGC 470, since the ancient collision. In another model, the tidal shells can be explained by a gas-rich spiral galaxy colliding with NGC 474 twice, before finally merging. NGC 474 is moving away from the Sun at a rate of 2412 km/s due to dark energy.

Supernova One supernova has been observed in NGC 474: SN 2017fgc (TypeIa, mag. 17.3239) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 11 July 2017. It was located at a considerable distance (~) from the galactic nucleus.

NGC 470 Group It is part of a galaxy group known as NGC 470 Group or LGG 20. It has at least 3 members, which are NGC 470, NGC 520 and UGC 957.

NGC 474

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