| Event type | Supernova  |
|---|---|
| SN Ic[1] | |
| Date | July 27, 1990[1] |
| Constellation | Pegasus |
| Right ascension | 23h 04m 54.96s[2] |
| Declination | +12° 18′ 20.1″[2] |
| Epoch | J2000.0 |
| Galactic coordinates | 086.2501 -42.8526 |
| Distance | 105,000,000 ly |
| Redshift | 0.00794[3] |
| Host | NGC 7479 |
| Peakapparent magnitude | 16±0.5[1] |
| Other designations | SN 1990U |
SN 1990U was aType Ic supernova event in the nucleus of the galaxyNGC 7479. It was discovered July 27, 1990 by the Berkeley Automated Supernova Search after reaching magnitude16±0.5.[1] Initially this was classified as a Type Ib supernova, but the weakness of the neutral heliumabsorption lines led to a reclassification.[4]
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