NGC 5559
Galaxy in the constellation Boötes
From Wikipedia, the free encyclopedia
NGC 5559 is a barred spiral galaxy, located 240 million light-years away in the constellation of Boötes.[1] It was discovered on April 10, 1785, by the astronomer William Herschel.[7]
| NGC 5559 | |
|---|---|
 NGC 5559 taken by Hubble Space Telescope.[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 19m 12.792s[2] |
| Declination | +24° 47′ 55.01″[2] |
| Redshift | 0.01717[3] |
| Heliocentric radial velocity | 5103 ± 3 km/s[3] |
| Distance | 252.1 Mly (77.30 Mpc)[4] |
| Apparent magnitude (B) | 14.81[5] |
| Characteristics | |
| Type | SBb[6] |
| Other designations | |
| UGC 9166, MCG +04-34-017, PGC 51155[3] | |
In 2001, a type Ib supernova was detected within NGC 5559, and was subsequently designated SN 2001co.[8][9] However, in 2003, the supernova was identified as a calcium-rich supernova, as it had strong spectral lines characteristic of calcium.[10] The progenitors of these calcium-rich supernovae are still a mystery.[1]
