Celestial hemisphere:  Southern  ·  Constellation: Grus (Gru)  ·  Contains:  IC 5294  ·  IC 5308  ·  NGC 7552  ·  NGC 7582  ·  NGC 7590  ·  NGC 7599
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Grus Quartet, Miles Zhou
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Grus Quartet

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Grus Quartet, Miles Zhou
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Grus Quartet

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Description

The Grus Quartet consists of four large spiral galaxies - NGC 7552, 7582, 7590, and 7599 (all shown) - situated at declination -42° in the southern constellation Grus, the Crane.

Three of them (NGC 7582, 7590, and 7599) are close together; the fourth (NGC 7552) is approximately 30' to the northwest (bottom-right).The quartet lies about 60 million light years beyond the foreground stars. The four galaxies are physically very close together and strongly interacting. The high starburst activity of two of the members, NGC 7552 and NGC 7582, is also thought to arise from tidal galaxy-galaxy interactions and subsequent formation of a bar in the disk.Several tidal tails are visible extending from NGC 7582, one pointing toward its neighbors in the east and the other toward NGC 7552. 

This is a simple LRGB combination.

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Grus Quartet, Miles Zhou