Messier 100 (also known as NGC 4321) is a w:spiral galaxy about 52.5 million w:light-years away in the w:constellation w:Coma Berenices. It was discovered by w:Pierre Méchain in w:1781. It is one of the brightest galaxies in the w:Virgo cluster. Five w:supernovae have been identified in M100: w:SN 1901B, w:SN 1914A, w:SN 1959E, w:SN 1979C and w:SN 2006X. M100 also has a w:satellite galaxy named w:NGC 4323.

Messier 100

Credit: w:ESO w:VLT view revealing complex spiral arm structure
Observation data (w:J2000 epoch)
Constellationw:Coma Berenices[1]
Right ascension12h 22m 54.9s[2]
Declination+15° 49′ 21″[2]
Redshift1571 ± 1 km/s[2]
Distance52.5 Mly[3]
Apparent dimensions (V)7′.4 × 6′.3[2]
Apparent magnitude (V)10.1[2]
Other designations
NGC 4321

Other images

External links


  1. R. W. Sinnott, editor (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 0-933-34651-4. {{cite book}}: |author= has generic name (help)
  2. a b c d e f "NASA/IPAC Extragalactic Database". Results for NGC 4321. Retrieved 2006-08-31.
  3. "Pattern Speeds BIMA-SONG Galaxies with Molecule-Dominated ISMs Using the Tremaine-Weinberg Method". (Ferrarese et al. 1996). Retrieved 2006-08-31.