KNOWPIA
WELCOME TO KNOWPIA
HD 154857 c 
Summary
HD 154857 c is an extrasolar planet located approximately 224 light-years away in the constellation of Ara, orbiting the star HD 154857. This planet takes about 3470 days (9.5 years) to orbit the star.
| Discovery | |
|---|---|
| Discovered by | O’Toole |
| Discovery site |  Australia |
| Discovery date | 9 February 2007 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 5.36 AU (802,000,000 km) | |
| Eccentricity | 0.06 |
| 3470 d 9.5 y | |
| Semi-amplitude | >23 |
| Star | HD 154857 |
The first signs of this planet were noticed on 9 February 2007 by O’Toole in Australia using the method Doppler spectroscopy, along with HD 23127 b and HD 159868 b. The orbit had not yet been completely observed, so the values quoted were lower limits. The previously unconstrained orbital period and minimum mass were constrained in January 2014.[1][2]
See also edit
References edit
- ^ 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.
- ^ The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs: Robert A. Wittenmyer, Jonathan Horner, C.G. Tinney, R.P. Butler, H.R.A. Jones, Mikko Tuomi, G.S. Salter, B.D. Carter, F. Elliott Koch, S.J. O'Toole, J. Bailey, D. Wright
External links edit
- "Notes for planet HD 154857 c". Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 154857". Exoplanets. Archived from the original on 2008-05-19. Retrieved 2008-08-25.