Discovery Method
Transit
Consistent across records
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ExoplanetDetail
WASP-121 b
Host star WASP-121 • 19.53 R⊕ • 1.27 d orbit
Records
11
archive rows
Discovery
2016
Transit
Radius
19.53 R⊕
default parameter set
Mass
371.9 M⊕
default parameter set
WASP-121
2409 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: Sing et al. 2024
Host Star
WASP-121
Stable across source rows
Discovery Year
2016
Stable across source rows
Orbital Period
1.27 day
1.27 to 1.27
Semi-Major Axis
0.03 au
0.03 to 0.03
Radius
19.53 Rearth
18.99 to 22.03
Mass
371.9 Mearth
367.7 to 376.0
Density
0.28 g/cm**3
0.24 to 0.28
Equilibrium Temperature
2409 K
2358 to 2720
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 19.53 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
WASP-121 b
19.53 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
11
Refs
11
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 20.90 Rearth | 376.0 Mearth | 2358 K | Delrez et al. 2016 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 22.03 Rearth | — | 2473 K | ExoFOP |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | — | — | — | Ivshina & Winn 2022 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 19.53 Rearth | 371.9 Mearth | 2409 K | Sing et al. 2024 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | — | — | — | — | Evans et al. 2016 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 18.99 Rearth | — | — | Evans et al. 2017 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 20.18 Rearth | — | 2720 K | Mikal-Evans et al. 2019 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | 19.65 Rearth | 367.7 Mearth | — | Bourrier et al. 2020 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | — | — | — | Kokori et al. 2022 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | — | — | — | Patel & Espinoza 2022 |
| 2016 | Transit | SuperWASP | Canon 200mm f/1.8L | 1.27 day | — | — | — | Kokori et al. 2023 |