UGC 4904

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]

UGC 4904
UGC 4904, imaged by the Sloan Digital Sky Survey
Observation data (J2000 epoch)
ConstellationLynx
Right ascension 09h 17m 21.709s[1]
Declination+41° 54′ 38.92″[1]
Redshift0.005571[2]
Helio radial velocity1665[2]
Apparent magnitude (B)15.0[3]
Characteristics
TypeSABdm[4]
Notable featuresDwarf spiral galaxy with a supernova impostor
Other designations
UGC 4904, MCG+07-19-054, PGC 26231

References
  1. Skrutskie, M. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.
  2. Nordgren, Tyler E.; Chengalur, Jayaram N.; Salpeter, E. E.; Terzian, Yervant (1997). "Close galaxy pairs in low and medium density regions: The southern sky". Astronomical Journal. 114: 913–931. Bibcode:1997AJ....114..913N. doi:10.1086/118523.
  3. "NED results for object UGC 4904". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 29 January 2017.
  4. Ann, H. B.; Seo, Mira; Ha, D. K. (2015). "A Catalog of Visually Classified Galaxies in the Local (z ∼ 0.01) Universe". The Astrophysical Journal Supplement Series. 217 (2): 27–49. arXiv:1502.03545. Bibcode:2015ApJS..217...27A. doi:10.1088/0067-0049/217/2/27.
  5. "Massive Star Burps, Then Explodes". Univ. of California, at Berkeley. Retrieved April 4, 2007.
  6. "NASA – Supernova Imposter Goes Supernova". NASA.Gov. Retrieved April 4, 2007.


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