| NGC 6221 | |
|---|---|
 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 velocity | 1390±7 km/s[1] |
| Apparent magnitude (V) | 9.28[1] |
| Absolute magnitude (V) | −20.97[1] |
| Characteristics | |
| Type | SB(s)bc[1] |
| Size | 70,000 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]
Two supernovae have been observed in NGC 6221: SN 1990W (type Ib/Ic, mag. 15),[4][5] and SN 2024pxg (type II, mag. 15.1).[6]
- ^ a b c d e f g h i j k "Object No. 1 - NGC 6221". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 3 October 2015.
- ^ "NGC 6221 (= PGC 59175)". cseligman. Retrieved 3 October 2015.
- ^ "Revised NGC Data for NGC 6221". Seds. Retrieved 3 October 2015.
- ^ "SN 1990W". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-19.
- ^ Transient Name Server entry for SN 1990W. Retrieved 24 July 2024.
- ^ Transient Name Server entry for SN 2024pxg. Retrieved 24 July 2024.