Discovery Method
Transit
Consistent across records
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ExoplanetDetail
HAT-P-18 b
Host star HAT-P-18 • 11.15 R⊕ • 5.51 d orbit
Records
12
archive rows
Discovery
2010
Transit
Radius
11.15 R⊕
default parameter set
Mass
62.61 M⊕
default parameter set
HAT-P-18
852 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: Hartman et al. 2011
Host Star
HAT-P-18
Stable across source rows
Discovery Year
2010
Stable across source rows
Orbital Period
5.51 day
5.51 to 5.51
Semi-Major Axis
0.06 au
0.06 to 0.06
Radius
11.15 Rearth
10.61 to 11.15
Mass
62.61 Mearth
58.16 to 63.57
Density
0.25 g/cm**3
0.25 to 0.29
Equilibrium Temperature
852 K
768.0 to 852
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 11.15 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
HAT-P-18 b
11.15 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
12
Refs
12
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | — | — | — | Seeliger et al. 2015 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | — | — | 58.16 Mearth | — | Knutson et al. 2014 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | 10.61 Rearth | 62.29 Mearth | 841 K | Esposito et al. 2014 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | 10.73 Rearth | — | 768.0 K | ExoFOP |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | — | — | — | Ivshina & Winn 2022 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | — | — | — | — | Fu et al. 2022 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | — | — | — | — | Kirk et al. 2017 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | 11.15 Rearth | 63.57 Mearth | — | Bonomo et al. 2017 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | 11.15 Rearth | 62.61 Mearth | 852 K | Hartman et al. 2011 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | — | — | — | Kokori et al. 2022 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | — | — | — | Patel & Espinoza 2022 |
| 2010 | Transit | HATNet | Canon 200mm f/1.8L | 5.51 day | — | — | — | Kokori et al. 2023 |