UGC 4904
Galaxy in the constellation Lynx
From Wikipedia, the free encyclopedia
UGC 4904 is a barred spiral galaxy in the constellation Lynx. Its velocity with respect to the cosmic microwave background is 1880 ± 15 km/s, which corresponds to a Hubble distance of 90.5 ± 6.4 Mly (27.74 ± 1.96 Mpc).[1] The first known reference to this galaxy comes from Part 2 of the Morphological Catalogue of Galaxies, published in 1964, where it is listed as MCG +07-19-054.[4]
| UGC 4904 | |
|---|---|
UGC 4904, imaged by the Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Lynx |
| Right ascension | 09h 17m 22.062s[1] |
| Declination | +41° 54′ 39.70″[1] |
| Redshift | 0.005571[2] |
| Heliocentric radial velocity | 1665[2] |
| Distance | 90.5 ± 6.4 Mly (27.74 ± 1.96 Mpc)[1] |
| Apparent magnitude (B) | 15.0[1] |
| Characteristics | |
| Type | SABdm[3] |
| Size | ~31,200 ly (9.58 kpc) (estimated)[1] |
| Notable features | Dwarf spiral galaxy with a supernova impostor which eventually exploded as an actual supernova |
| Other designations | |
| MCG +07-19-054, PGC 26231, CGCG 209-044[1] | |
Supernova
On October 20, 2004, a supernova impostor was observed by Japanese amateur astronomer Kōichi Itagaki within the galaxy. This same star may have transitioned from a luminous blue variable star to a Wolf–Rayet star[5] shortly before it was observed as blowing up as supernova SN 2006jc (Type Ibn, mag. 13.8)[6] on October 11, 2006.[7]
