NGC 6221

Last updated
NGC 6221
NGC 6221 hst 05479 606.png
NGC 6221 as seen through the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Ara
Right ascension 16h 52m 46.1s [1]
Declination −59° 13′ 07″ [1]
Redshift 0.004999±0.000017 [1]
Heliocentric radial velocity 1499±5 km/s [1]
Galactocentric velocity1390±7 km/s [1]
Apparent magnitude  (V)9.28 [1]
Absolute magnitude  (V)−20.97 [1]
Characteristics
Type SB(s)bc [1]
Size70,000 light years
Apparent size  (V)3.5′ × 2.5′ [1]
Other designations
ESO 138-3, AM 1648-590, IRAS16484-5908 and PGC 59175
References: NASA/IPAC extragalactic datatbase, http://spider.seds.org/

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 [1] and was discovered by British astronomer John Herschel on 3 May 1835. [2] NGC 6221 is located at about 69 million light years from Earth. [1] [3]

Contents

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. [4]

Supernovae

Two supernovae have been observed in NGC 6221:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "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.
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