Astrophysics (index)

Triangulum Galaxy

(M33, Messier 33, NGC 598)
(small spiral galaxy in the Local Group)

The Triangulum Galaxy (M33, Messier 33, or NGC 598) is a Spiral Galaxy about two and a half million light-years away. It is one of the most distant objects visible by the naked eye, with an Apparent Magnitude of 5.72. It is estimated to have 40 billion stars, and is 50,000 light-years across and is the third largest Galaxy of the Local Group after Andromeda and the Milky Way, which are also the only spiral galaxies of the Local Group.


  • Triangulum - constellation.
  • 01h33m50.02s - Right Ascension.
  • +30deg39m36.7s - Declination.
  • 2.5 million ly - distance.
  • SA(s)cd - type.
  • 70m - apparent dimension.

(galaxy,Local Group,spiral)
/Lookback Years
.0002800kpc2.50MlyTriangulum Galaxy

Referenced by:
Dwarf Galaxy
Large Magellanic Cloud (LMC)
Local Group (LG)
Messier Catalog
Spiral Galaxy