HD 154857 b
Appearance
Discovery | |
---|---|
Discovered by | McCarthy et al. AAT ![]() |
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]
References
[edit]- ^ McCarthy, Chris; et al. (2004). "Multiple Companions to HD 154857 and HD 160691". The Astrophysical Journal. 617 (1): 575–579. arXiv:astro-ph/0409335. Bibcode:2004ApJ...617..575M. doi:10.1086/425214. S2CID 119446133.
- ^ O'Toole, Simon J.; et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal. 660 (2): 1636–1641. arXiv:astro-ph/0702213. Bibcode:2007ApJ...660.1636O. doi:10.1086/513563. S2CID 118958847.
External links
[edit]- "HD 154857 b". Extrasolar Planets Encyclopaedia. Archived from the original on July 2, 2007. Retrieved 2008-07-21.
- Simulation HD 154857 b
- news.bbc.co.uk