NGC 7331 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 member of the NGC 7331 Group of galaxies.

Distance to Earth: 39.79 million light years

Apparent mass: ~1,400 billion M☉

Radius: 60,000 light years

Magnitude: 10.4

Apparent size (V): 10′.5 × 3′.7

Redshift: 816 ± 1 km/s