Spiral galaxy · Pegasus

NGC 7331

Also known as: C30

mag 9.49.3′ across

About

NGC 7331 is a spiral galaxy of magnitude 9.4 in Pegasus, about 9.3′ across.

NGC 7331 is in the constellation Pegasus.
Best evenings: around mid-October it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 46° S.
Great Square of Pegasus: A bright spiral galaxy 4½° north of Matar; a telescope.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesNot visible to the naked eye.
Binoculars (10×50)A faint smudge, only from a dark site.
Telescope (6–8 inch)A faint oval glow with a brighter middle — no spiral arms without a camera.

For a dark country sky with no Moon. From a city, faint galaxies and nebulae can disappear completely.

Designations	NGC 7331, C30, PGC 69327, UGC 12113
Type	Spiral galaxy (Sbc)
Magnitude	9.4The smaller the number, the brighter.
Apparent size	9.3′ × 3.8′position angle 170°; the full Moon is 31′ across
Surface brightness	23.1 mag/arcsec²Average over its disc, in the blue band: the lower the number, the easier it is to see.
Constellation	Pegasus
Right ascension (J2000)	22h 37m 04.0s
Declination (J2000)	+34° 24′ 56″