Temperature
5788 K
5600 to 5910
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Stellar HostProfile
HD 118203
K0 IV • 92.26 pc
Records
13
literature rows
Planets
2
system count
References
14
distinct source labels
HIP: HIP 66192HD: HD 118203TIC: TIC 286923464
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: Maciejewski et al. 2024 • System source: TICv8
Mass
1.22 Msun
1.05 to 1.84
Radius
2.03 Rsun
1.83 to 2.10
Age
5.25 Gyr
3.58 to 5.32
Luminosity
0.70 log(Lsun)
0.62 to 0.70
Distance
92.26 pc
single adopted value
Spectral Type
K0 IV
Multiple classifications reported
Planets
2
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 2.03 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 118203
2.03 R☉
System Layout
Known planets
2 planets linked to this host
HD 118203 b
Radial Velocity
◌
Discovery
2005
Period
6.13 days
Radius
12.78 R⊕
Mass
680.2 M⊕
Eq. Temp
1361 K
HD 118203 c
Radial Velocity
◌
Discovery
2024
Period
5103 days
Radius
—
Mass
3747.2 M⊕
Eq. Temp
—
HD 118203 and Its Two Worlds
HD 118203 is a K0 IV star located 301 light-years away. It is 5.25 billion years old and hosts two planets. Its reported mass is 1.22 solar masses, its radius is 2.03 solar radii, and its temperature is 5790 K. The star's reported mass estimate is larger than the Sun's, and its reported radius estimate is larger than the Sun's.
The first planet, HD 118203 b, was discovered in 2005 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. It is a Jupiter-like planet with a mass of 680 Earth masses and a radius of 12.8 Earth radii. Its orbital period is 6.13 days, and its mean density is 1.8 g/cm³, 0.326 times Earth's. Among the listed planets, HD 118203 b has the shortest year and the smallest reported mass.
The second planet, HD 118203 c, was discovered in 2024, also by radial velocity. It has a mass of 3750 Earth masses and an orbital period of 5100 days. Among the listed planets, HD 118203 c has the longest year and the largest reported mass.
Provenance
Underlying measurements and references
Evidence Summary
Rows
13
Stellar refs
13
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Agedisputed
Luminositydisputed
Surface Gravitydisputed
Metallicitydisputed
Spectral Typedisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 5890 | 1.34 | 1.83 | 3.58 | — | — | 92.26 | Sousa et al. 2015 | TICv8 |
| 5600 | 1.23 | — | 4.60 | — | K0 | 92.26 | da Silva et al. 2006 | TICv8 |
| 5910 | 1.21 | — | — | — | — | 92.26 | Santos et al. 2013 | TICv8 |
| 5828.7 | — | 2.05 | — | — | — | 92.26 | ExoFOP | TICv8 |
| 5828.7 | — | 2.06 | — | 0.65 | — | 92.26 | Gaia DR2 | TICv8 |
| 5742 | 1.27 | 2.04 | 4.73 | — | — | 92.26 | Zhang et al. 2024 | TICv8 |
| 5683 | 1.13 | 2.10 | 5.32 | — | — | 92.26 | Knudstrup et al. 2024 | TICv8 |
| 5864 | 1.84 | 2.06 | — | — | — | 92.26 | Stassun et al. 2017 | TICv8 |
| 5872 | 1.35 | 1.99 | — | 0.65 | — | 92.26 | Castro-González et al. 2024 | TICv8 |
| 5683 | 1.25 | 2.10 | 5.32 | 0.62 | — | 92.26 | Pepper et al. 2020 | TICv8 |
| 5836.9 | 1.05 | 2.05 | — | 0.64 | — | 92.26 | TICv8 | TICv8 |
| — | — | — | — | — | K0 | 92.26 | Cannon & Pickering 1918 | TICv8 |
| 5788 | 1.22 | 2.03 | 5.25 | 0.70 | K0 IV | 92.26 | Maciejewski et al. 2024 | TICv8 |