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 | |
|---|---|
.jpg) NGC 4559 imaged by the Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 35m 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 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]
See also edit
- Messier 99 – a similar spiral galaxy
Gallery edit
-
Hubble Space Telescope showing the inner structure
References edit
- ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 4559. Retrieved 2020-12-21.
- ^ Sandage, A.; Tammann, G.A. (1975). "Steps toward the Hubble constant. V - The Hubble constant from nearby galaxies and the regularity of the local velocity field". The Astrophysical Journal. 196: 313–328. Bibcode:1975ApJ...196..313S. doi:10.1086/153413. ISSN 0004-637X.
- ^ Gregory, S.A.; Thompson, L. A. (1977). "The Coma I Galaxy Cloud". The Astrophysical Journal. 213: 345–350. Bibcode:1977ApJ...213..345G. doi:10.1086/155160. ISSN 0004-637X.
- ^ David Bishop (6 July 2021). "LBV 2016blu in NGC 4559". rochesterastronomy.org. Retrieved 9 August 2021.
External links edit
Media related to NGC 4559 at Wikimedia Commons- NGC 4559 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
