Discovery | |
---|---|
Discovered by | McCarthy et al. AAT Australia |
Discovery site | AAPS |
Discovery date | 2004 |
Radial velocity | |
Orbital characteristics | |
Apastron | 1.8 AU (270,000,000 km) |
Periastron | 0.64 AU (96,000,000 km) |
1.2 ± 0.2 AU (180,000,000 ± 30,000,000 km) | |
Eccentricity | 0.47±0.02 |
409±1 d 1.12 y | |
2450346±5 | |
59±4 | |
Semi-amplitude | 50.4±1 |
Star | HD 154857 |
Physical characteristics | |
Mass | >1.8±0.4 MJ (>570±100 ME) |
HD 154857 b is an extrasolar planet approximately 224 light years away in the constellation of Ara. This is a gas giant mass that orbits the star in an eccentric orbit. This planet was detected by using Anglo-Australian Telescope (AAT) UCLE spectrometer.[1][2]