Temperature
5630 K
5534 to 5630
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Stellar HostProfile
HD 159868
Unclassified star • 55.85 pc
Records
13
literature rows
Planets
2
system count
References
14
distinct source labels
HD: HD 159868TIC: TIC 248320609HIP: HIP 86375
Approximate color
from effective temperature
Canonical Summary
Adopted host values from one source row
Values come from the row with the most populated summary measurements. Missing values stay missing. Ranges and counts describe all source rows.
Stellar source: Jofré et al. 2015 • System source: TICv8
Mass
1.08 Msun
0.92 to 1.42
Radius
1.78 Rsun
1.78 to 2.13
Age
7.57 Gyr
single adopted value
Luminosity
0.53 log(Lsun)
0.49 to 0.56
Distance
55.85 pc
single adopted value
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.78 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 159868
1.78 R☉
System Layout
Known planets
2 planets linked to this host
HD 159868 b
Radial Velocity
◌
Discovery
2006
Period
1184.1 days
Radius
—
Mass
704.9 M⊕
Eq. Temp
—
HD 159868 c
Radial Velocity
◌
Discovery
2012
Period
351 days
Radius
—
Mass
244.1 M⊕
Eq. Temp
—
HD 159868 and Its Two Worlds
HD 159868 is a Sun-like star 182 light-years away. Its spectral type, G5 V, marks it as a G-type main-sequence dwarf. It is older than the Sun at 7.57 billion years, and its reported mass estimate is 1.08 solar masses, larger than the Sun's mass. Its reported radius estimate is 1.78 solar radii, also larger than the Sun's radius, while its temperature of 5630 K is cooler than the Sun's. Two planets orbit this host.
Both planets were found by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. HD 159868 b was discovered in 2006, and HD 159868 c in 2012.
HD 159868 b has a minimum mass of 705 Earth masses, larger than Earth's and roughly 2.22 times Jupiter's mass. Its orbital period is 1180 days, the longest year among the listed planets. HD 159868 c has a minimum mass of 244 Earth masses, also larger than Earth's, and the smallest minimum mass among the listed planets. It completes an orbit in 351 days, the shortest year among the listed planets.
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Stellar refs
13
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agestable
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | — | 55.85 | Valenti & Fischer 2005 | TICv8 |
| — | — | — | — | — | — | 55.85 | Henry et al. 1996 | TICv8 |
| — | — | — | — | — | G5 | 55.85 | Cannon & Pickering 1918 | TICv8 |
| 5576.5 | — | 2.03 | — | 0.56 | — | 55.85 | Gaia DR2 | TICv8 |
| 5534 | 0.97 | 2.06 | — | 0.56 | — | 55.85 | TICv8 | TICv8 |
| 5558 | 1.16 | — | — | — | — | 55.85 | Mortier et al. 2013 | TICv8 |
| 5566 | 1.42 | 1.97 | — | — | — | 55.85 | Stassun et al. 2017 | TICv8 |
| 5558 | 0.92 | — | — | 0.49 | — | 55.85 | Sousa et al. 2008 | TICv8 |
| 5630 | 1.08 | 1.78 | 7.57 | 0.53 | — | 55.85 | Jofré et al. 2015 | TICv8 |
| — | — | — | — | — | — | 55.85 | Nordstrom et al. 2004 | TICv8 |
| 5534 | 1.19 | 2.13 | — | — | — | 55.85 | Luhn et al. 2019 | TICv8 |
| 5558 | 1.09 | — | — | — | G5 V | 55.85 | Wittenmyer et al. 2012 | TICv8 |
| — | — | — | — | — | G5 V | 55.85 | Michigan Catalog, Vol. 2 | TICv8 |