HD 154857 b
| 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±1d 1.12y | |
| 2450346±5 | |
| 59±4 | |
| Semi-amplitude | 50.4±1 |
| Star | HD 154857 |
| Physical characteristics | |
| Mass | >1.8±0.4MJ (>570±100ME) |
HD 154857 bis anextrasolar planetapproximately 224light yearsaway in theconstellationofAra.This is agas giantmass that orbits the star in an eccentric orbit. This planet was detected by usingAnglo-Australian Telescope(AAT) UCLEspectrometer.[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.S2CID119446133.
- ^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.S2CID118958847.
External links
[edit]- "HD 154857 b".Extrasolar Planets Encyclopaedia.Archived fromthe originalon July 2, 2007.Retrieved2008-07-21.
- Simulation HD 154857 b
- news.bbc.co.uk
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