NGC 5921 is a barred spiral galaxy located approximately 65 million light-years from the Solar System in the constellation Serpens Caput. It was discovered by William Herschel on 1 May 1786.[4] In February 2001 a type II supernova (SN 2001X) was discovered in NGC 5921.[5] It is a member of the Virgo III Groups, a series of galaxies and galaxy clusters strung out to the east of the Virgo Supercluster of galaxies.[6]

NGC 5921
NGC 5921 as taken at the Mount Lemmon SkyCenter
Observation data (J2000 epoch)
ConstellationSerpens Caput
Right ascension15h 21m 56.5s[1]
Declination+05° 04′ 14″[1]
Redshift0.00470 ± 0.00001[2]
Helio radial velocity1480 ± 1 km/s[1]
Distance65 Mly[3]
Apparent magnitude (V)11.5[1]
Apparent size (V)4′.9 × 4′.0[1]
Other designations
UGC 9824,[1] PGC 54849[1]
Hubble Space Telescope image of NGC 5921's center

See alsoEdit


  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 5921. Retrieved 2006-11-25.
  2. ^ "NGC 5921". Retrieved 2017-12-08.
  3. ^ An object's distance from Earth can be determined using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho
  4. ^ "New General Catalog Objects: NGC 5900 - 5949". Retrieved 2017-12-08.
  5. ^ "Bright Supernovae - 2001". ASRAS. Archived from the original on 4 July 2015. Retrieved 3 July 2015.
  6. ^ "The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.

External linksEdit