Discovery Method
Transit
Consistent across records
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ExoplanetDetail
K2-9 b
Host star K2-9 • 2.25 R⊕ • 18.45 d orbit
Records
5
archive rows
Discovery
2015
Transit
Radius
2.25 R⊕
default parameter set
Mass
—
default parameter set
K2-9
314 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: Schlieder et al. 2016
Host Star
K2-9
Stable across source rows
Discovery Year
2015
Stable across source rows
Orbital Period
18.45 day
18.45 to 18.45
Semi-Major Axis
0.09 au
0.08 to 0.11
Radius
2.25 Rearth
1.60 to 5.60
Equilibrium Temperature
314 K
284 to 314
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 2.25 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
K2-9 b
2.25 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Refs
5
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2015 | Transit | K2 | 0.95 m Kepler Telescope | 18.45 day | 3.33 Rearth | — | — | Vanderburg et al. 2016 |
| 2015 | Transit | K2 | 0.95 m Kepler Telescope | 18.45 day | 2.25 Rearth | — | 314 K | Schlieder et al. 2016 |
| 2015 | Transit | K2 | 0.95 m Kepler Telescope | 18.45 day | 5.60 Rearth | — | — | Crossfield et al. 2016 |
| 2015 | Transit | K2 | 0.95 m Kepler Telescope | 18.45 day | 3.09 Rearth | — | — | Kruse et al. 2019 |
| 2015 | Transit | K2 | 0.95 m Kepler Telescope | 18.45 day | 1.60 Rearth | — | 284 K | Montet et al. 2015 |