HD 154857 c
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 154857 | |
| Constellation | Ara | |
| Right ascension | (α) | 17h 11m 15.7219s |
| Declination | (δ) | –56° 40′ 50.865″ |
| Distance | 223.55 ly (68.54 pc) | |
| Spectral type | G5V | |
| Orbital elements | ||
| Semi-major axis | (a) | 5.36 AU |
| Eccentricity | (e) | 0.06 |
| Orbital period | (P) | 3470 d (9.5 y) |
| Semi-amplitude | (K) | >23 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 2.6 MJ |
| Discovery information | ||
| Discovery date | 9 February 2007 | |
| Discoverer(s) | O’Toole | |
| Discovery method | Doppler spectroscopy | |
| Discovery site |  Australia | |
| Discovery status | Published | |
| Other designations | ||
| HIP 84069 c, SAO 244491 c | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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.
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
- HD 154857 b
- List of unconfirmed exoplanets
References
- ↑ 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. - ↑ 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
- "Notes for planet HD 154857 c". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 154857". Exoplanets. Retrieved 2008-08-25.
Coordinates: 
17h 11m 15.7219s, −56° 40′ 50.865″
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