NGC 1559
Galaxy in the constellation Reticulum
From Wikipedia, the free encyclopedia
NGC 1559 is a barred spiral galaxy in the constellation Reticulum. It was discovered on 6 November 1826 by Scottish astronomer James Dunlop.[2]
| NGC 1559 | |
|---|---|
NGC 1559 imaged by the Hubble Space Telescope | |
| Observation data (J2000.0 epoch) | |
| Constellation | Reticulum |
| Right ascension | 04h 17m 35.7506s[1] |
| Declination | −62° 47′ 01.316″[1] |
| Redshift | 1304 ± 4 km/s[1] |
| Distance | 48.73 ± 2.18 Mly (14.942 ± 0.669 Mpc)[1] |
| Apparent magnitude (V) | 11[1] |
| Characteristics | |
| Type | SB(s)cd[1] |
| Size | ~75,600 ly (23.17 kpc) (estimated)[1] |
| Apparent size (V) | 3.5′ × 2.0′[1] |
| Other designations | |
| ESO 084- G 010, IRAS 04170-6253, 2MASX J04173578-6247012, PGC 14814[1] | |
NGC 1559 is a Seyfert galaxy, i.e. it has a quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable. Although it was originally thought to be a member of the Dorado Group,[3] subsequent observations have shown that it is in fact not a member of any galaxy group or cluster and does not have any nearby companions.[4][5] NGC 1559 has massive spiral arms and strong star formation.[4] It contains a small bar which is oriented nearly east–west and spans 40″.[4] Its bar and disc are the source of very strong radio emissions.[4]
Supernovae
Four supernovae have been observed in NGC 1559:
- SN 1984J (Type II, mag. 13.5) was discovered by Australian amateur astronomer Robert Evans[6] on 27 July 1984.[7][8]
- SN 1986L (Type II, mag. 13.5) was discovered by Robert Evans on 7 October 1986.[9][10]
- SN 2005df (Type Ia, mag 13.8) was discovered by Robert Evans on 4 August 2005.[11][12] It got as bright as magnitude 12.3, making it the brightest supernova observed in 2005.[13]
- SN 2009ib (Type II-P, mag. 14.7) was discovered by the CHASE project (CHilean Automatic Supernova sEarch) on 6 August 2009.[14][15]
