NGC 3972

NGC 3972
NGC 3972 imaged by tne Hubble Space Telescope.[1]
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension11h 55m 45.1s[2]
Declination+55° 19′ 14″[2]
Redshift0.002799[3]
Heliocentric radial velocity846 km/s[2]
Distance66.0 Mly (20.23 Mpc)[2]
Group or clusterNGC 3992 Group[4]
Apparent magnitude (V)13.14[3]
Characteristics
TypeSA(s)bc,[5] SBbc[6]
Sizec. 50,000 ly
Other designations
IRAS 11531+5535, 2MASX J11554511+5519144, UGC 6904, LEDA 37466, MCG +09-20-032[3]

NGC 3972 is a spiral galaxy located in the northern constellation of Ursa Major. It was discovered by William Herschel on April 14, 1789.[7] This galaxy is located 66 million light years away and is receding with a heliocentric radial velocity of 846 km/s.[2] It is a member of the NGC 3992 Group of galaxies.[4]

Two supernovae have been observed in NGC 3972. Type Ia supernova SN 2011by was discovered in this galaxy on April 26, 2011, by Zhangwei Jin and Xing Gao in China. It was magnitude 14.2 ten days short of maximum, and positioned at an offset 5.3″ east and 19.1″ north of the galactic nucleus.[8][9] Also, SN 2021acna (type II, mag. 19.4) was discovered on 30 October 2021.[10]

  1. ^ Cite error: The named reference SnT was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Cosmicflows3 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference simbad was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Karachentsev_et_al_2013 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference NED was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Paturel2003 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Seligman was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Boyd2011 was invoked but never defined (see the help page).
  9. ^ "SN 2011by". Transient Name Server. IAU. Retrieved 4 September 2024.
  10. ^ "SN 2021acna". Transient Name Server. IAU. Retrieved 4 September 2024.