Galaxy in the constellation Andromeda
NGC 662 is aspiral galaxy in theconstellation ofAndromeda. Its velocity with respect to thecosmic microwave background is 5,397 ± 18 km/s, which corresponds to aHubble distance of 79.6 ± 5.6 Mpc (~260 millionlight-years).[1] It was discovered byFrench astronomerÉdouard Stephan on 22 November 1884.[2]
According to theSimbad database, NGC 662 is aradio galaxy.[3] It features a broadHI line[4] and is classified afield galaxy, meaning it does not belong to thegalaxy group nor acluster and is therefore gravitationally isolated.[5]
Threesupernovae have been observed in NGC 662:
- SN 2001dn (Type Ia, mag. 15.5) was discovered byTom Boles on 14 August 2001.[6][7]
- SN 2022ojo (Type II-P, mag. 16.938) was discovered byATLAS on 5 July 2022.[8]
- SN 2024pcw (Type II, mag. 18.724) was discovered by ATLAS on 8 July 2024.[9]
- ^abcdefghijk"Results for object NGC 662".NASA/IPAC Extragalactic Database.NASA andCaltech. Retrieved23 July 2024.
- ^Seligman, Courtney."New General Catalogue Objects: NGC 662".Celestial Atlas. Retrieved13 December 2024.
- ^"NGC 662".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved13 December 2024.
- ^Haynes, Martha P.; Giovanelli, Riccardo; Herter, Terry; Vogt, Nicole P.; Freudling, Wolfram; Maia, M. A. G.; Salzer, J. J.; Wegner, G. (1997-04-01)."21 CM H1 Line Spectra of Galaxies in Nearby Clusters".The Astronomical Journal.113:1197–1211.Bibcode:1997AJ....113.1197H.doi:10.1086/118337.ISSN 0004-6256.
- ^Karachentseva, V. E. (1973-01-01)."The Catalogue of Isolated Galaxies".Astrofizicheskie Issledovaniia Izvestiya Spetsial'noj Astrofizicheskoj Observatorii.8:3–49.Bibcode:1973AISAO...8....3K.
- ^Hurst, G. M.; Boles, T.; Armstrong, M. (2001)."Supernova 2001dn in NGC 662".International Astronomical Union Circular (7681): 1.Bibcode:2001IAUC.7681....1H.
- ^"SN 2001dn".Transient Name Server.IAU. Retrieved13 December 2024.
- ^"SN 2022ojo".Transient Name Server.IAU. Retrieved13 December 2024.
- ^"SN 2024pcw".Transient Name Server.IAU. Retrieved13 December 2024.
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Media related toNGC 662 at Wikimedia Commons
