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