Temperature
3377 K
3377 to 3880.6
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Stellar HostProfile
K2-129
Unclassified star • 27.80 pc
Records
4
literature rows
Planets
1
system count
References
5
distinct source labels
TIC: TIC 2468648
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: TICv8 • System source: TICv8
Mass
0.34 Msun
0.34 to 0.36
Radius
0.36 Rsun
0.21 to 0.36
Luminosity
-1.83 log(Lsun)
single adopted value
Distance
27.80 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.36 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-129
0.36 R☉
System Layout
Known planets
1 planets linked to this host
K2-129 b
Transit
◌
Discovery
2017
Period
8.24 days
Radius
1.04 R⊕
Mass
—
Eq. Temp
—
K2-129 b: An Earth-Sized World Around a Small, Cool Star
K2-129 is a star located 90.7 light-years from Earth, and it hosts one known planet. The star's reported mass estimate is 0.341 solar masses, its reported radius estimate is 0.356 solar radii, and its temperature is 3380 K. Its mass and radius are both smaller than the Sun's, and its temperature is cooler than the Sun's.
The planet, K2-129 b, was discovered in 2017 by the transit method, which detects the small dip in a star's brightness when a planet passes in front of it from our viewpoint. K2-129 b is classified as Earth-like, meaning its radius stays within 1.5 times Earth's radius. Its radius is 1.04 Earth radii, and it completes one orbit, or one year, every 8.24 days.
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Stellar refs
4
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitystable
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| 3377 | 0.34 | 0.36 | — | -1.83 | — | 27.80 | TICv8 | TICv8 |
| 3880.6 | — | — | — | — | — | 27.80 | Gaia DR2 | TICv8 |
| 3459.1 | 0.36 | 0.36 | — | — | — | 27.80 | Dressing et al. 2017 | TICv8 |
| — | — | 0.21 | — | — | — | 27.80 | Kruse et al. 2019 | TICv8 |