HD 150706
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 16h 31m 17.5856s |
| Declination | +79° 47′ 23.189″ |
| Apparent magnitude (V) | 7.029 |
| Distance | 88.76 ly (27.23 pc) |
| Spectral type | G0V |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
HD 150706 is a 7th magnitude star in the constellation of Ursa Minor. It is a remarkably Sun-like yellow dwarf (spectral type G0V) being only 6% less massive than the Sun.
Distance to the star, 89 light years, is enough that it is not visible to the unaided eye. However, it is an easy target for binoculars. It is located only about 10° from the northern celestial pole so it is always visible on the northern hemisphere except for near the equator. Likewise, it is never visible in most of the southern hemisphere.
The existence of an extrasolar planet orbiting this star was announced at the Scientific Frontiers in Research on Extrasolar Planets conference in 2002 . The claimed planet had a minimum mass equal to the mass of Jupiter and was thought to be located in an elliptical orbit with a period of 264 days. However independent measurements of the star failed to confirm the existence of the planet,[1] and the planet does not appear in the current web version of the Catalog of Nearby Exoplanets. But another planet was discovered in system in 2012; this Jupiter-twin completes one orbit in roughly 16 years. Its eccentricity and orbit is very poorly constrained.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.71+1.14 −0.66 MJ |
6.7+4.0 −1.4 |
5894+5584 −1498 |
0.38+0.28 −0.32 |
— | — |
See also
References
- ↑ Wright, J.T.; Marcy, G.W.; Fischer, D.A.; Butler, R.P.; Vogt, S.S.; Tinney, C.G.; Jones, H.R.A.; Carter, B.D.; Johnson, J.A.; McCarthy, C.; Apps, K. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal. 657 (1): 533–45. arXiv:astro-ph/0611658
. Bibcode:2007ApJ...657..533W. doi:10.1086/510553. - 1 2 Boisse, I.; et al. (2012). "The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars". Astronomy and Astrophysics. 545. A55. arXiv:1205.5835. Bibcode:2012A&A...545A..55B. doi:10.1051/0004-6361/201118419.