Temperature
3677 K
3677 to 4117.6
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Stellar HostProfile
K2-89
Unclassified star • 86.04 pc
Records
5
literature rows
Planets
1
system count
References
6
distinct source labels
TIC: TIC 440687723
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
0.53 Msun
0.35 to 0.53
Radius
0.54 Rsun
0.32 to 0.54
Luminosity
-1.33 log(Lsun)
single adopted value
Distance
86.04 pc
single adopted value
Planets
1
Stable across source rows
Scale Comparison
Radius against the Sun
Current adopted radius: 0.54 R☉ (circles scaled linearly by radius)
Sun
1.0 R☉ baseline
K2-89
0.54 R☉
System Layout
Known planets
1 planets linked to this host
K2-89 b
Transit
◌
Discovery
2016
Period
1.10 days
Radius
0.61 R⊕
Mass
—
Eq. Temp
—
K2-89 b: A Sub-Earth
K2-89 is a star 281 light-years away with one known planet. The star has a mass of 0.532 solar masses and a radius of 0.535 solar radii, both smaller than the Sun's, and its temperature of 3680 K is cooler than the Sun's.
The planet K2-89 b is a Sub-Earth, meaning its radius is smaller than Earth's. Its radius is 0.615 Earth radii. It was discovered by transit in 2016, and its orbital period is 1.1 days. 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.
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Stellar refs
5
System refs
1
Distancestable
Parallaxstable
Temperaturedisputed
Massdisputed
Radiusdisputed
Luminositystable
Surface Gravitydisputed
| ST TEFF | ST MASS | ST RAD | ST AGE | ST LUM | ST SPECTYPE | SY DIST | Stellar Ref | System Ref |
|---|---|---|---|---|---|---|---|---|
| — | — | — | — | — | — | 86.04 | Dressing et al. 2017 | TICv8 |
| — | — | 0.32 | — | — | — | 86.04 | Kruse et al. 2019 | TICv8 |
| 4117.6 | — | — | — | — | — | 86.04 | Gaia DR2 | TICv8 |
| 3691 | 0.35 | 0.32 | — | — | — | 86.04 | Crossfield et al. 2016 | TICv8 |
| 3677 | 0.53 | 0.54 | — | -1.33 | — | 86.04 | TICv8 | TICv8 |