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 as seen through the Hubble Space Telescope | |
Observation data (J2000 epoch) | |
Constellation | Ara |
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]
gollark: Also, there would probably be global state problems, and then you run into lifetimes.
gollark: Off you go, go implement it.
gollark: That sounds annoyingly hard.
gollark: This is the duckduckgo instant answers API. They will be.
gollark: But what if the first three are irrelevant?
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.
- Koribalski, Bärbel; Dickey, John M. (2004). "Neutral Hydrogen Gas in Interacting Galaxies: The NGC 6221 / 6215 galaxy group". Monthly Notices of the Royal Astronomical Society. 348 (4): 1255. arXiv:astro-ph/0501190. Bibcode:2004MNRAS.348.1255K. doi:10.1111/j.1365-2966.2004.07444.x. Retrieved 17 December 2015.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.