NGC 6221

NGC 6221 (also known as PGC 59175) is a barred spiral galaxy located in the constellation Ara. It is designated as SB(s)bc in the galaxy morphological classification scheme and was discovered by British astronomer John Herschel on 3 May 1835. NGC 6221 is located at about 69 million light years from earth.[1][2][3]

NGC 6221
NGC 6221 hst 05479 606
NGC 6221 as seen through the Hubble Space Telescope
Observation data (J2000 epoch)
Right ascension 16h 52m 46.1s
Declination −59° 13′ 07″
Redshift 0.004999±0.000017
Helio radial velocity 1499±5 km/s
Galactocentric velocity 1390±7 km/s
Apparent magnitude (V) 9.28
Absolute magnitude (V) -21.01
Characteristics
Type SB(s)bc
Size 70,000 light years
Apparent size (V) 3.50′ × 2.5′
Other designations
ESO 138-3, AM 1648-590, IRAS16484-5908 and PGC 59175
References: NASA/IPAC extragalactic datatbase, http://spider.seds.org/

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]

See also

References

  1. ^ "Object No. 1 - NGC 6221". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 3 October 2015.
  2. ^ "Revised NGC Data for NGC 6221". Seds. Retrieved 3 October 2015.
  3. ^ "NGC 6221 (= PGC 59175)". cseligman. Retrieved 3 October 2015.
  4. ^ "Neutral Hydrogen Gas in Interacting Galaxies: The NGC 6221 / 6215 galaxy group". Australia Telescope National Facility. Retrieved 17 December 2015.

Coordinates: Sky map 16h 52m 46.1s, +-59° 13′ 07″

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