HD 176051
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Lyra (constellation) |
| Right ascension | 18h 57m 01.6105s[1] |
| Declination | +32° 54′ 04.585″[1] |
| Apparent magnitude (V) | 5.22 |
| Characteristics | |
| Spectral type | F9V[2] (G0V/K1V)[3] |
| U−B color index | +0.029[4] |
| B−V color index | +0.570[4] |
| Astrometry | |
| Radial velocity (Rv) | −47.2[5] km/s |
| Proper motion (μ) | RA: 202.86[1] mas/yr Dec.: −143.98[1] mas/yr |
| Parallax (π) | 66.76 ± 0.54[1] mas |
| Distance | 48.9 ± 0.4 ly (15.0 ± 0.1 pc) |
| Details | |
| Mass | 1.07/0.71[3] M☉ |
| Surface gravity (log g) | 4.60[6] cgs |
| Temperature | 6,000[6] K |
| Metallicity [Fe/H] | −0.11[6] dex |
| Age | 8.1[7] Gyr |
| Other designations | |
HD 176051 is a spectroscopic binary star system[2] 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.[6] Their individual masses are estimated at 1.07 and 0.71 solar masses (M☉).[3]
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 parent star is a binary star. The planet parameters are given for the 0.71 M☉ component B (Muterspaugh et al. 2010). If the planet is orbiting the 1.07 M☉ component A, its mass is 2.26 MJ and a = 2.02 AU.
References
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- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ 6.0 6.1 6.2 6.3 Lua error in package.lua at line 80: module 'strict' not found.
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