HD 176051
Spectroscopic binary star system in the constellation of Lyra
From Wikipedia, the free encyclopedia
HD 176051 is a spectroscopic binary star system[12] approximately 49 light years away from Earth in the constellation Lyra. The pair orbit with a period of 22,423 days (61.4 years) and an eccentricity of 0.25.[8] Compared to the Sun, they have a somewhat lower proportion of elements more massive than helium.[10] Their individual masses are estimated at 1.07 and 0.71 solar masses (M☉).[3] The system is moving closer to the Sun with a radial velocity of −47[5] km/s and will reach perihelion in about 269,000 years when it comes within roughly 17 ly (5.1 pc) of the Sun.[13]
Planetary system
A planet orbiting one of the stars was discovered through astrometric observations. However, it is not known which stellar component the planet is orbiting around.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | 1.5 ± 0.3 MJ | 1.76 | 1016 ± 40 | 0 | — | — |
The planet parameters are given here for the 0.71 M☉ component B.[7] But, if instead the planet is orbiting the 1.07 M☉ component A, its mass is 2.26 MJ with a semimajor axis of 2.02 AU.[14]