Discovery Method
Transit
Consistent across records
←Back to Exoplanets
ExoplanetDetail
KELT-21 b
Host star KELT-21 • 17.78 R⊕ • 3.61 d orbit
Records
4
archive rows
Discovery
2018
Transit
Radius
17.78 R⊕
default parameter set
Mass
1242.7 M⊕
default parameter set
KELT-21
2051 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: Johnson et al. 2018
Host Star
KELT-21
Stable across source rows
Discovery Year
2018
Stable across source rows
Orbital Period
3.61 day
3.61 to 3.61
Semi-Major Axis
0.05 au
single adopted value
Radius
17.78 Rearth
17.78 to 19.37
Mass
1242.7 Mearth
single adopted value
Density
1.24 g/cm**3
single adopted value
Equilibrium Temperature
2051 K
2051 to 2344
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 17.78 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
KELT-21 b
17.78 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
4
Refs
4
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massstable
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2018 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 3.61 day | — | — | — | Kokori et al. 2023 |
| 2018 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 3.61 day | — | — | — | Ivshina & Winn 2022 |
| 2018 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 3.61 day | 19.37 Rearth | — | 2344 K | ExoFOP |
| 2018 | Transit | KELT-North | Mamiya 645 80mm f/1.9 | 3.61 day | 17.78 Rearth | 1242.7 Mearth | 2051 K | Johnson et al. 2018 |