Celestial hemisphere:  Southern  ·  Constellation: Grus (Gru)  ·  Contains:  IC 5294  ·  IC 5308  ·  NGC 7552  ·  NGC 7582  ·  NGC 7590  ·  NGC 7599  ·  PGC 100685  ·  PGC 107158  ·  PGC 107159  ·  PGC 107160  ·  PGC 107161  ·  PGC 107162  ·  PGC 107164  ·  PGC 107166  ·  PGC 107169  ·  PGC 107170  ·  PGC 107172  ·  PGC 107173  ·  PGC 107215  ·  PGC 107216  ·  PGC 107217  ·  PGC 107218  ·  PGC 107219  ·  PGC 123598  ·  PGC 123599  ·  PGC 123600  ·  PGC 123601  ·  PGC 123602  ·  PGC 123603  ·  PGC 123604  ·  And 300 more.
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Grus Quartet, Massimo Ermanni
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Grus Quartet

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Grus Quartet, Massimo Ermanni
Powered byPixInsight

Grus Quartet

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Description

Grus is a constellation in the southern sky. It consists of four large spiral galaxies - NGC 7552, 7582, 7590, and 7599 - situated at declination -42° in the southern constellation Grus, the Crane.

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. These streams can only be seen in photographs, but might be visible in the largest amateur telescopes.

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Grus Quartet, Massimo Ermanni