Discovery Method
Transit
Consistent across records
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ExoplanetDetail
KELT-9 b
Host star KELT-9 • 21.20 R⊕ • 1.48 d orbit
Records
6
archive rows
Discovery
2017
Transit
Radius
21.20 R⊕
default parameter set
Mass
915.4 M⊕
default parameter set
KELT-9
4050 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: Gaudi et al. 2017
Host Star
KELT-9
Stable across source rows
Discovery Year
2017
Stable across source rows
Orbital Period
1.48 day
1.48 to 1.48
Semi-Major Axis
0.03 au
single adopted value
Radius
21.20 Rearth
19.99 to 21.20
Mass
915.4 Mearth
775.5 to 915.4
Density
0.53 g/cm**3
single adopted value
Equilibrium Temperature
4050 K
3446.0 to 4050
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 21.20 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
KELT-9 b
21.20 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Refs
6
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | — | 19.99 Rearth | 775.5 Mearth | — | Hoeijmakers et al. 2019 |
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 1.48 day | 20.34 Rearth | — | 3446.0 K | ExoFOP |
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 1.48 day | — | — | — | Ivshina & Winn 2022 |
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 1.48 day | 21.20 Rearth | 915.4 Mearth | 4050 K | Gaudi et al. 2017 |
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 1.48 day | — | — | — | Wong et al. 2020 |
| 2017 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 1.48 day | — | — | — | Kokori et al. 2023 |