NGC 4051
Template:Short description Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". NGC 4051 is an intermediate spiral galaxy in the constellation of Ursa Major.[1] It was discovered on 6 February 1788 by John Herschel.[2]
NGC 4051 contains a supermassive black hole with a mass of 1.73 million [[Solar mass|Template:Solar mass]].[3] This galaxy was studied by the Multicolor Active Galactic Nuclei Monitoring 2m telescope.[4]
The galaxy is a Seyfert galaxy that emits bright X-rays. However, in early 1998 the X-ray emission ceased as observed by the Beppo-SAX satellite. X-ray emission had risen back to normal by August 1998.[5]
NGC 4051 is a member of the Ursa Major Cluster.[6][7][8] Its peculiar velocity is −490 ± 34 km/s, consistent with the rest of the cluster.[9] It is a member of the NGC 4111 Group,[10][11] which is part of the Ursa Major Cloud and is the second largest group in the cloud after the NGC 3992 Group.[12][13][14]
Supernovae
Three supernovae have been discovered in NGC 4051:
- SN 1983I (type Ic, mag. 13.5) was discovered independently by J. Kielkopf et al, on 11 May 1983, and by Tsvetkov on 12 May 1983.[15][16]
- SN 2003ie (type II, mag. 15.2) was discovered by Ron Arbour on 19 September 2003.[17][18]
- SN 2010br (type Ib/c, mag. 17.7) was discovered by Vitali Nevski on 10 April 2010.[19][20]
References
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Notes
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External links
- Template:WikiSky
- SN 2010br located 19".5 east and 10" south of the center at 12 03 10.96 +44 31 42.8 / Wikisky DSS2 zoom-in of same region
Template:Sky Template:Ngc45 Template:Ursa Major Template:Catalogs