Temperature
5440 K
5436.3 to 5467
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Stellar HostProfile
HD 171238
G8 V • 44.81 pc
Records
8
literature rows
Planets
1
system count
References
9
distinct source labels
HD: HD 171238HIP: HIP 91085TIC: TIC 228217280
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: Ment et al. 2018 • System source: TICv8
Mass
0.96 Msun
0.92 to 0.96
Radius
1.01 Rsun
0.92 to 1.01
Age
7.56 Gyr
4.92 to 7.56
Luminosity
-0.09 log(Lsun)
-0.20 to -0.09
Distance
44.81 pc
single adopted value
Spectral Type
G8 V
Multiple classifications reported
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 1.01 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
HD 171238
1.01 R☉
System Layout
Known planets
1 planets linked to this host
HD 171238 b
Radial Velocity
◌
Discovery
2009
Period
1515 days
Radius
—
Mass
2796.9 M⊕
Eq. Temp
—
HD 171238 and Its Planet
HD 171238 is a G8 V star located 146 light-years away. It is a main-sequence dwarf of spectral type G8 V, with 0.96 solar masses, 1.01 solar radii, a temperature of 5440 K, and an age of 7.56 billion years. Its reported temperature is cooler than the Sun's.
One planet orbits this star: HD 171238 b, discovered by the radial velocity method in 2009. That method measures the wobble a planet's gravity induces in its star's motion; repeated wobbles reveal the planet and its orbital period. The planet has a mass of 2800 Earth masses, roughly 8.8 times Jupiter's mass - larger than Earth's. Its orbital period is 1520 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
8
Stellar refs
8
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 |
|---|---|---|---|---|---|---|---|---|
| 5467 | 0.94 | — | 4.92 | — | K0 V | 44.81 | Ségransan et al. 2010 | TICv8 |
| — | — | — | — | — | G5 | 44.81 | Cannon & Pickering 1918 | TICv8 |
| 5440 | 0.95 | 0.92 | — | -0.18 | — | 44.81 | TICv8 | TICv8 |
| 5436.3 | — | 0.92 | — | -0.18 | — | 44.81 | Gaia DR2 | TICv8 |
| 5440 | 0.96 | 1.01 | 7.56 | -0.09 | G8 V | 44.81 | Ment et al. 2018 | TICv8 |
| — | — | — | — | — | G8 V | 44.81 | Michigan Catalog, Vol. 3 | TICv8 |
| — | — | — | — | — | — | 44.81 | Nordstrom et al. 2004 | TICv8 |
| — | 0.92 | — | 7 | -0.20 | G8 V | 44.81 | Li et al. 2021 | TICv8 |