Temperature
4364 K
4230.6 to 4500
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Stellar HostProfile
K2-136
K5 V • 59.25 pc
Records
7
literature rows
Planets
3
system count
References
8
distinct source labels
TIC: TIC 18310799
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: Ciardi et al. 2018 • System source: TICv8
Mass
0.71 Msun
0.66 to 0.74
Radius
0.71 Rsun
0.66 to 0.77
Age
0.69 Gyr
0.65 to 0.69
Luminosity
-0.79 log(Lsun)
-0.79 to -0.76
Distance
59.25 pc
single adopted value
Spectral Type
K5 V
Multiple classifications reported
Planets
3
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.71 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-136
0.71 R☉
System Layout
Known planets
3 planets linked to this host
K2-136: A Nearby K-Type Dwarf and Its Three Known Worlds
K2-136 is a K5 V star located 193 light-years away. Its reported mass is 0.71 solar masses and its reported radius is 0.71 solar radii, both smaller than the Sun's, and its reported temperature of 4360 K is cooler than the Sun's. The star's age is 0.688 billion years. A K-type main-sequence dwarf of this kind is cooler and redder than the Sun. Three planets are known to orbit this host.
K2-136 b, K2-136 c, and K2-136 d were all discovered by transit in 2017. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. K2-136 b is an Earth-like planet with a radius of 1.01 Earth radii and an orbital period of 7.98 days, the shortest year among the listed planets. Its mass is a reported upper limit of 4.3 Earth masses. K2-136 d is a Super-Earth with a radius of 1.57 Earth radii and an orbital period of 25.6 days, the longest year among the listed planets, and its mass is a reported upper limit of 3 Earth masses. K2-136 c is a Neptune-like planet with a radius of 3 Earth radii, larger than Earth's, and a mass of 18.1 Earth masses, also larger than Earth's. Its mean density is 3.69 g/cm³, 0.67 times Earth's. K2-136 c orbits every 17.3 days, the second-shortest year among the listed planets, and has the largest radius among them.
Size classes compare radius with Earth's: an Earth-like planet stays within 1.5 times Earth's radius, a Super-Earth reaches 2.5 times, and a Neptune-like planet reaches 4 times. Upper limits are reported bounds rather than exact values.
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Stellar refs
7
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 |
|---|---|---|---|---|---|---|---|---|
| 4499 | 0.74 | 0.66 | — | -0.79 | K5.5 | 59.25 | Mann et al. 2018 | TICv8 |
| 4230.6 | — | 0.77 | — | — | — | 59.25 | ExoFOP | TICv8 |
| 4364 | 0.71 | 0.71 | 0.69 | -0.79 | K5 V | 59.25 | Ciardi et al. 2018 | TICv8 |
| 4334 | — | 0.72 | — | -0.78 | — | 59.25 | Gaia DR2 | TICv8 |
| 4359 | 0.69 | 0.72 | — | -0.77 | — | 59.25 | Livingston et al. 2018 | TICv8 |
| 4230.6 | 0.66 | 0.77 | — | -0.76 | — | 59.25 | TICv8 | TICv8 |
| 4500 | 0.74 | 0.68 | 0.65 | -0.78 | — | 59.25 | Mayo et al. 2023 | TICv8 |