Discovery Method
Transit
Consistent across records
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ExoplanetDetail
WASP-21 b
Host star WASP-21 • 11.99 R⊕ • 4.32 d orbit
Records
11
archive rows
Discovery
2010
Transit
Radius
11.99 R⊕
default parameter set
Mass
95.34 M⊕
default parameter set
WASP-21
temperature unconstrained
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: Bouchy et al. 2010
Host Star
WASP-21
Stable across source rows
Discovery Year
2010
Stable across source rows
Orbital Period
4.32 day
4.32 to 4.32
Semi-Major Axis
0.05 au
0.05 to 0.05
Radius
11.99 Rearth
11.99 to 15.15
Mass
95.34 Mearth
87.72 to 95.34
Density
0.32 g/cm**3
0.18 to 0.32
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 11.99 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
WASP-21 b
11.99 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 |
|---|---|---|---|---|---|---|---|---|
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | — | — | — | Chen et al. 2020 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | 15.15 Rearth | — | 1314.2 K | ExoFOP |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | 11.99 Rearth | 94.40 Mearth | — | Bonomo et al. 2017 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | — | — | — | Seeliger et al. 2015 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | — | — | — | Ivshina & Winn 2022 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | 11.99 Rearth | 95.34 Mearth | — | Bouchy et al. 2010 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | — | — | — | Kokori et al. 2023 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | — | — | — | Kokori et al. 2022 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | — | 12.89 Rearth | 92.17 Mearth | — | Alderson et al. 2020 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | 13.02 Rearth | 87.72 Mearth | 1333 K | Ciceri et al. 2013 |
| 2010 | Transit | SuperWASP | Canon 200mm f/1.8L | 4.32 day | 14.16 Rearth | 93.76 Mearth | 1340 K | Southworth 2012 |