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  • 21 Aug, 2019

  • By, Wikipedia

NGC 6221
NGC 6221 (also known as PGC 59175) is a barred spiral galaxy located in the constellation Ara. In de Vaucouleurs' galaxy morphological classification scheme, it is classified as SB(s)bc and was discovered by British astronomer John Herschel on 3 May 1835. NGC 6221 is located at about 69 million light years from Earth.

Galaxy group information

NGC 6221 is part of galaxy group NGC 6221/15, which includes spiral galaxy NGC 6215 and three dwarf galaxies. Interactions between NGC 6221 and NGC 6215 form a double-stranded bridge of neutral hydrogen gas over a projected distance of 100 kpc; Dwarf 3 of the three dwarf galaxies may have formed from the bridging gas.

Supernovae

Two supernovae have been observed in NGC 6221:

  • SN 1990W (type Ib/Ic, mag. 15) was discovered by Robert Evans on 16 August 1990.
  • SN 2024pxg (type II, mag. 15.1) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 23 July 2024.

See also

References

  1. ^ "Object No. 1 - NGC 6221". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 3 October 2015.
  2. ^ "NGC 6221 (= PGC 59175)". cseligman. Retrieved 3 October 2015.
  3. ^ "Revised NGC Data for NGC 6221". Seds. Retrieved 3 October 2015.
  4. ^ Koribalski, Bärbel; Dickey, John M. (2005). "Neutral Hydrogen Gas in Interacting Galaxies: The NGC 6221 / 6215 galaxy group". Monthly Notices of the Royal Astronomical Society. 348 (4): 202–210. arXiv:astro-ph/0501190. Bibcode:2004MNRAS.348.1255K. doi:10.1111/j.1365-2966.2004.07444.x. Retrieved 17 December 2015.
  5. ^ Evans, R.; Sadler, E.; McNaught, R. H. (1990). "Supernova 1990W in NGC 6221". International Astronomical Union Circular (5076): 1. Bibcode:1990IAUC.5076....1E.
  6. ^ "SN 1990W". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-19.
  7. ^ "SN 1990W". Transient Name Server. IAU. Retrieved 6 December 2024.
  8. ^ "SN 2024pxg". Transient Name Server. IAU. Retrieved 6 December 2024.
  • Media related to NGC 6221 at Wikimedia Commons



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