Discovery Method
Transit
Consistent across records
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ExoplanetDetail
WASP-18 b
Host star WASP-18 • 13.90 R⊕ • 0.94 d orbit
Records
19
archive rows
Discovery
2009
Transit
Radius
13.90 R⊕
default parameter set
Mass
3241.8 M⊕
default parameter set
WASP-18
2429 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: Cortés-Zuleta et al. 2020
Host Star
WASP-18
Stable across source rows
Discovery Year
2009
Stable across source rows
Orbital Period
0.94 day
0.90 to 0.94
Semi-Major Axis
0.02 au
0.02 to 0.02
Radius
13.90 Rearth
12.40 to 15.34
Mass
3241.8 Mearth
3213.3 to 3636.0
Density
6.60 g/cm**3
6.60 to 10.30
Equilibrium Temperature
2429 K
2251 to 2429
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 13.90 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
WASP-18 b
13.90 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
19
Refs
19
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.06 Rearth | 3314.8 Mearth | — | Hellier et al. 2009 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 12.98 Rearth | 3270.5 Mearth | 2392 K | Southworth 2010 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | — | — | 3327.7 Mearth | — | Knutson et al. 2014 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | — | 13.06 Rearth | 3315.0 Mearth | — | Southworth et al. 2009 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 14.20 Rearth | 3213.3 Mearth | — | Triaud et al. 2010 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.04 Rearth | 3299.1 Mearth | 2413 K | Southworth 2012 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.90 day | 14.60 Rearth | 3241.7 Mearth | 2400 K | Salz et al. 2015 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | — | — | — | — | Csizmadia et al. 2019 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.35 Rearth | 3305.4 Mearth | — | Shporer et al. 2019 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | — | 3314.8 Mearth | — | Pearson 2019 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 15.34 Rearth | — | 2251 K | ExoFOP |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | — | — | — | Ivshina & Winn 2022 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.37 Rearth | — | — | Deline et al. 2025 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | — | — | — | Salguneswaran Nediyedath et al. 2026 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.45 Rearth | 3636.0 Mearth | — | Stassun et al. 2017 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 12.40 Rearth | 3241.9 Mearth | — | Bonomo et al. 2017 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | — | — | — | Kokori et al. 2022 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | 13.90 Rearth | 3241.8 Mearth | 2429 K | Cortés-Zuleta et al. 2020 |
| 2009 | Transit | SuperWASP | Canon 200mm f/1.8L | 0.94 day | — | — | — | Kokori et al. 2023 |