Temperature
5303 K
5135.7 to 5303
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Stellar HostProfile
HD 103197
Unclassified star • 57.15 pc
Records
6
literature rows
Planets
1
system count
References
7
distinct source labels
HIP: HIP 57931TIC: TIC 400806831HD: HD 103197
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: Mordasini et al. 2011 • System source: TICv8
Mass
0.90 Msun
0.80 to 0.90
Age
9.10 Gyr
single adopted value
Luminosity
-0.33 log(Lsun)
-0.33 to -0.25
Distance
57.15 pc
single adopted value
Planets
1
Stable across source rows
System Layout
Known planets
1 planets linked to this host
HD 103197 b
Radial Velocity
◌
Discovery
2011
Period
47.84 days
Radius
—
Mass
28.60 M⊕
Eq. Temp
—
HD 103197 and Its Lone Known Planet
HD 103197 is a K1 V(P) star 186 light-years away, with a reported age of 9.1 billion years, a mass of 0.9 solar masses, and a temperature of 5300 K. Its reported mass estimate is smaller than the Sun's, and its reported temperature is cooler than the Sun's. One planet is known to orbit this host.
That planet is HD 103197 b, discovered in 2011 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 103197 b has a minimum mass of 28.6 Earth masses, larger than Earth's, and an orbital period of 47.8 days, or its year. A minimum mass is a lower bound on a planet's true mass, distinct from an ordinary mass estimate.
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Stellar refs
6
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 |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | K1 V(P) | 57.15 | Michigan Catalog, Vol. 2 | TICv8 |
| 5303 | 0.90 | — | 9.10 | -0.33 | — | 57.15 | Mordasini et al. 2011 | TICv8 |
| — | — | — | — | — | K5 | 57.15 | Cannon & Pickering 1918 | TICv8 |
| 5250 | 0.90 | 0.90 | — | -0.26 | — | 57.15 | TICv8 | TICv8 |
| 5250 | 0.80 | 0.88 | — | — | — | 57.15 | Stassun et al. 2017 | TICv8 |
| 5135.7 | — | 0.95 | — | -0.25 | — | 57.15 | Gaia DR2 | TICv8 |