UGC 4904 explained

UGC 4904
Epoch:	J2000
Constellation Name:	Lynx
Ra:	^[1]
Z:	0.005571
H Radial V:	1665^[2]
Type:	SABdm^[3]
Appmag B:	15.0^[4]
Notes:	Dwarf spiral galaxy with a supernova impostor

UGC 4904 is a barred spiral galaxy in the constellation Lynx, located about 77 million light-years from Earth. On October 20, 2004, a supernova impostor was observed by Japanese amateur astronomer Koichi Itagaki within the galaxy. This same star may have transitioned from a LBV star to a Wolf–Rayet star^[5] shortly before it was observed as blowing up as hypernova SN 2006jc on October 11, 2006.^[6]

External links

• UGC 4904 in a SIMBAD
• UGC 4904 in NASA's Extragalactic Database

Notes and References

1. 10.1086/498708 . Skrutskie . Michael F. . Cutri . Roc M. . Stiening . Rae . Weinberg . Martin D. . Schneider . Stephen E. . Carpenter . John M. . Beichman . Charles A. . Capps . Richard W. . Chester . Thomas . Elias . Jonathan H. . Huchra . John P. . Liebert . James W. . Lonsdale . Carol J. . Monet . David G. . Price . Stephan . Seitzer . Patrick . Jarrett . Thomas H. . Kirkpatrick . J. Davy . Gizis . John E. . Howard . Elizabeth V. . Evans . Tracey E. . Fowler . John W. . Fullmer . Linda . Hurt . Robert L. . Light . Robert M. . Kopan . Eugene L. . Marsh . Kenneth A. . McCallon . Howard L. . Tam . Robert . Van Dyk . Schuyler D. . Wheelock . Sherry L. . The Two Micron All Sky Survey (2MASS) . The Astronomical Journal . 1 February 2006 . 131 . 2 . 1163–1183 . 2006AJ....131.1163S . 18913331 . 0004-6256 . free .
2. Close galaxy pairs in low and medium density regions: The southern sky. Nordgren, Tyler E.. Chengalur, Jayaram N.. Salpeter, E. E.. Terzian, Yervant . Yervant Terzian . Astronomical Journal. 114. 913–931. 1997. 10.1086/118523. 1997AJ....114..913N. free.
3. A Catalog of Visually Classified Galaxies in the Local (z ∼ 0.01) Universe. Ann, H. B.. Seo, Mira. Ha, D. K.. The Astrophysical Journal Supplement Series. 217. 2. 27–49. 2015. 2015ApJS..217...27A. 10.1088/0067-0049/217/2/27. 1502.03545. 119253507.
4. Web site: NED results for object UGC 4904. 29 January 2017. .
5. Web site: Massive Star Burps, Then Explodes. Univ. of California, at Berkeley. April 4, 2007.
6. Web site: NASA – Supernova Imposter Goes Supernova. NASA.Gov. April 4, 2007.