| NGC 4559 | |
|---|---|
NGC 4559 imaged by the Sloan Digital Sky Survey
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| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h35m 57.7s[1] |
| Declination | +27° 57′ 35″[1] |
| Redshift | 816 ± 9 km/s[1] |
| Distance | ~ 29 Mly (8.859 Mpc)[1] |
| Apparent magnitude (V) | 10.4[1] |
| Characteristics | |
| Type | SAB(rs)cd[1] |
| Apparent size (V) | 10.7′ × 4.4′[1] |
| Other designations | |
| UGC 7766,[1] PGC 42002,[1] Caldwell 36 | |
NGC 4559 (also known as Caldwell 36) is an intermediate spiral galaxy with a weak inner ring structure in the constellation Coma Berenices. Distance estimates for NGC 4559 range from about 28 million light-years to 31 million light-years, averaging about 29 million light-years.[1]
NGC 4559 is a member of the Coma I Group.[2][3]
Two supernovae have been recorded in NGC 4559, A Type II-L supernova in 1941 (SN 1941A) and an unclassified supernova event in 2019.
The luminous blue variable AT2016blu in NGC 4559 experiences repeated supernova-like outbursts. First observed in January 2012, it burst out again in 2014, 2016, 2017, 2018, 2019, 2020 and 2021.[4]
Media related to NGC 4559 at Wikimedia Commons
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