HD 156846
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Ophiuchus |
| Right ascension | 17h 20m 34s |
| Declination | -19º 20' 21″ |
| Apparent magnitude (V) | 6.51 |
| Absolute magnitude (V) | 3.06 |
| Distance | 160 ly (49 pc) |
| Spectral type | G0V |
| Other designations | |
HD 156846 is a sun-like star in the Ophiuchus constellation. It has magnitude 6.5 and located 160 light years away. The star has an M4 companion and a planet.
[edit] HD 156846 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.99 AU |
| Eccentricity | (e) | 0.8472±0.0016 |
| Orbital period | (P) | 359.51±0.09 d |
| Angular distance | (θ) | 20 mas |
| Longitude of periastron |
(ω) | 52.23±0.41° |
| Time of periastron | (T0) | 2453998.09±0.05 JD |
| Semi-amplitude | (K) | 123.9 m/s |
| Physical characteristics | ||
| Mass | (m) | >10.45±0.05 MJ |
| Discovery information | ||
| Discovery date | Oct 2007 | |
| Discoverer(s) | Tamuz et al. | |
| Detection method | radial velocity | |
| Discovery status | Published | |
HD 156846 b is one of the most eccentric planets of all (e=0.8472). The high eccentricity of this planet is probably caused by the presence of a red dwarf companion star. The average distance of a planet from HD 156846 is 0.99 AU, which is very similar to the distance of Earth from the Sun. The distance ranges from 0.15 AU to 1.83 AU with 360 day period. It is also very massive with 10.45 Jupiter mass.
[edit] References
- O. Tamuz, D. Ségransan, S. Udry, M. Mayor, A. Eggenberger, D. Naef, F. Pepe, D. Queloz, N.C. Santos, B.-O. Demory, P. Figuera, M. Marmier, G. Montagnier (2007). "The CORALIE survey for southern extra-solar planets XV. Discovery of two eccentric planets orbiting HD4113 and HD156846". A&A.
[edit] External links
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