NGC 7331

Spiral Galaxy NGC 7331 (= H I.53), type Sb, in Pegasus

Right Ascension 22 : 37.1 (h:m)
Declination +34 : 25 (deg:m)
Distance 46000 (kly)
Visual Brightness 9.5 (mag)
Apparent Dimension 11 x 4 (arc min)

Discovered by William Herschel in 1784.

NGC 7331 is one of the brighter galaxies which is not included in Messier's catalog. It exposes a fine spiral structure despite its small inclination from the edge-on position. Several companions and background galaxies are visible even in our photo.

Our image is a CCD image by Robert Stephens of the Riverside Astronomical Society.

NGC 7331 was among the earliest recognized spiral galaxies, and listed by Lord Rosse in his list of 14 "spiral or curvilinear nebulae" discovered before 1850.

One supernova has been discovered in NGC 7331 so far: SN 1959D, discovered by Milton Humason at 32"W and 13"N of the galaxy's nucleus. This supernova became as bright as 13.4 mag (see IAUC 1682 and PASP 105, 1250).

NGC 7331 is contained in the SAC 110 Best NGC List. In the RASC's Finest N.G.C. Objects Objects list. Caldwell 30 in Patrick Moore's list.

  • NED data of NGC 7331
  • SIMBAD Data of NGC 7331
  • Publications on NGC 7331 (NASA ADS)
  • Observing Reports for NGC 7331 (IAAC Netastrocatalog)
  • NGC Online data for NGC 7331

    Hartmut Frommert
    Christine Kronberg

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    Last Modification: March 29, 1998