HIP 14810
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HIP 14810 is a star with three exoplanetary companions in the northern constellation of Aries. It positioned about 1.3° to the north of Delta Arietis, but is too faint to be visible to the naked eye with an apparent visual magnitude of 8.6. The system is located at a distance of 165 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −5 km/s.
This is an ordinary G-type main-sequence star with a stellar classification of G6V. It has a relatively low activity level and a low projected rotational velocity of 0.5 km/s, which indicates it is an old star with an age of around eight billion years. The star has a high metallicity with a mass and luminosity about the same as the Sun.
Planetary system
Orbiting the star are three confirmed planets. The discovery paper for HIP 14810 b and HIP 14810 c was published in 2007, while that for HIP 14810 d was published in 2009, together with a revision for the orbital parameters for planet c. Simulations suggest that the orbits of these planets do not allow a stable orbit for a hypothetical super-earth in the habitable zone.
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥3.9±0.49 MJ | 0.0696±0.0044 | 6.673892±0.000008 | 0.14399±0.00087 | — | — |
| c | ≥1.31±0.18 MJ | 0.549±0.034 | 147.747±0.029 | 0.1566±0.0099 | — | — |
| d | ≥0.59±0.1 MJ | 1.94±0.13 | 981.8±6.9 | 0.185±0.035 | — | — |
See also
External links
- 2016-05-05 at the Wayback Machine by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona