Discovery Method
Transit
Consistent across records
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ExoplanetDetail
G 9-40 b
Host star G 9-40 • 1.90 R⊕ • 5.75 d orbit
Records
5
archive rows
Discovery
2019
Transit
Radius
1.90 R⊕
default parameter set
Mass
4 M⊕
default parameter set
G 9-40
440.6 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: Luque et al. 2022
Host Star
G 9-40
Stable across source rows
Discovery Year
2019
Stable across source rows
Orbital Period
5.75 day
5.75 to 5.75
Semi-Major Axis
0.04 au
0.04 to 0.04
Radius
1.90 Rearth
1.90 to 2.06
Mass
4 Mearth
4 to 11.70
Density
3.20 g/cm**3
single adopted value
Equilibrium Temperature
440.6 K
393 to 456
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 1.90 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
G 9-40 b
1.90 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Refs
5
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2019 | Transit | K2 | 0.95 m Kepler Telescope | 5.75 day | — | — | — | Kokori et al. 2023 |
| 2019 | Transit | K2 | 0.95 m Kepler Telescope | 5.75 day | 2.06 Rearth | — | 393 K | ExoFOP |
| 2019 | Transit | K2 | 0.95 m Kepler Telescope | 5.75 day | 2.02 Rearth | 11.70 Mearth | 456 K | Stefansson et al. 2020 |
| 2019 | Transit | K2 | 0.95 m Kepler Telescope | 5.75 day | — | — | — | Yu et al. 2018 |
| 2019 | Transit | K2 | 0.95 m Kepler Telescope | 5.75 day | 1.90 Rearth | 4 Mearth | 440.6 K | Luque et al. 2022 |