Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  NGC 7317  ·  NGC 7318  ·  NGC 7319  ·  NGC 7320  ·  NGC 7331  ·  NGC 7335  ·  NGC 7337  ·  NGC 7340
NGC 7331 and Stephan's Quintet, AstroAdventures
NGC 7331 and Stephan's Quintet
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NGC 7331 and Stephan's Quintet

NGC 7331 and Stephan's Quintet, AstroAdventures
NGC 7331 and Stephan's Quintet
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NGC 7331 and Stephan's Quintet

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Description

NGC 7331, also known as Caldwell 30, is an unbarred spiral galaxy about 40 million light-years away in the constellation Pegasus. It was discovered by William Herschel in 1784. NGC 7331 is the brightest galaxy in the field of a visual grouping known as the NGC 7331 Group of galaxies.

Distance to Earth: 39.79 million light years - Magnitude: 10.4 - Radius: 60,000 light years- Apparent mass: ~1,400 billion M☉ - Redshift: 816 ± 1 km/s - Apparent size (V): 10′.5 × 3′.7

Wikipedia

Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group, visible in the constellation Pegasus, was discovered by Édouard Stephan in 1877 at the Marseille Observatory. The group is the most studied of all the compact galaxy groups.

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NGC 7331 and Stephan's Quintet, AstroAdventures