NGC 5221 is a spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 7,258±21 km/s, which corresponds to a Hubble distance of 349.2 ± 24.5 Mly (107.06 ± 7.50 Mpc).[1] However, eight non-redshift measurements give a closer mean distance of 317.31 ± 5.34 Mly (97.288 ± 1.638 Mpc).[2] It was discovered by German-British astronomer William Herschel on 12 April 1784.[3]
NGC 5221 is a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.[4][5]
Arp 288
NGC 5221 together with NGC 5222 and PGC 93122 are catalogued as Arp 288 by Halton Arp in his Atlas of Peculiar Galaxies, in the category of "wind effects."[6] The group is described by Arp as "Streamers in both directions from edge of spiral." The three galaxies are also listed as VV 315 in the Vorontsov-Vel'yaminov Interacting Galaxies catalogue.
Supernova
One supernova has been observed in NGC 5221:
- SN 2016bln (Type Ia-91T, mag. 19.2) was discovered by the Palomar Transient Factory on 4 April 2016.[7][8][9] At the time, it was described as "one of the earliest detections of an over-luminous SN Ia made to date."[8]
Image gallery
NGC 5221 imaged by the Hubble Space Telescope
See also
References
- 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 5221". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 February 2026.
- ↑ "Distance Results for NGC 5221". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 12 February 2026.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 5221". Celestial Atlas. Retrieved 12 February 2026.
- ↑ Lin, Yen-Ting; Huang, Hung-Jin; Chen, Yen-Chi (2018). "An Analysis Framework for Understanding the Origin of Nuclear Activity in Low-power Radio Galaxies". The Astronomical Journal. 155 (5): 188. arXiv:1803.02482. Bibcode:2018AJ....155..188L. doi:10.3847/1538-3881/aab5b4.
- ↑ "NGC 5221". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 February 2026.
- ↑ Arp, Halton (1966). Atlas of Peculiar Galaxies. Pasadena, California: California Institute of Technology. Retrieved 5 January 2010. (online version, including Arp's original tabular data, and PDF link)
- ↑ Miller, A. A.; Laher, R.; Masci, F.; Surace, J.; Rebbapragada, U.; Bue, B.; Doran, G.; Bellm, E.; Cao, Y.; Kasliwal, M.; Kulkarni, S. (2016). "IPTF Discovery of a Young Transient in a Tidal Tail of NGC 5221". The Astronomer's Telegram. 8907: 1. Bibcode:2016ATel.8907....1M.
- 1 2 Cenko, S. B.; Cao, Y.; Kasliwal, M.; Miller, A. A.; Fremling, C.; West, M.; Gregg, M.; Kulkarni, S. R. (2016). "DCT and Gemini Spectroscopic Classification of AT 2016bln (=iPTF 16abc)". The Astronomer's Telegram. 8909: 1. Bibcode:2016ATel.8909....1C.
- ↑ "SN 2016bln". Transient Name Server. IAU. Retrieved 12 February 2026.
External links
Media related to NGC 5221 at Wikimedia Commons- NGC 5221 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
