Discovery Method
Transit
Consistent across records
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ExoplanetDetail
K2-189 b
Host star K2-189 • 1.40 R⊕ • 2.59 d orbit
Records
4
archive rows
Discovery
2018
Transit
Radius
1.40 R⊕
default parameter set
Mass
—
default parameter set
K2-189
1203 K equilibrium
Canonical Summary
Adopted planet values from the default parameter set
Values come from the archive's default parameter set. Missing values stay missing. Ranges and counts describe all source rows.
Selected source: Howard et al. 2025
Host Star
K2-189
Stable across source rows
Discovery Year
2018
Stable across source rows
Orbital Period
2.59 day
2.59 to 5.18
Radius
1.40 Rearth
1.40 to 1.59
Equilibrium Temperature
1203 K
1197 to 1203
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 1.40 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
K2-189 b
1.40 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Refs
4
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2018 | Transit | K2 | 0.95 m Kepler Telescope | 2.59 day | 1.52 Rearth | — | 1197 K | Livingston et al. 2018 |
| 2018 | Transit | K2 | 0.95 m Kepler Telescope | 5.18 day | 1.51 Rearth | — | — | Mayo et al. 2018 |
| 2018 | Transit | K2 | 0.95 m Kepler Telescope | 2.59 day | 1.40 Rearth | — | 1203 K | Howard et al. 2025 |
| 2018 | Transit | K2 | 0.95 m Kepler Telescope | 2.59 day | 1.59 Rearth | — | — | Kruse et al. 2019 |