Discovery Method
Transit
Consistent across records
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ExoplanetDetail
HAT-P-9 b
Host star HAT-P-9 • 15.61 R⊕ • 3.92 d orbit
Records
10
archive rows
Discovery
2008
Transit
Radius
15.61 R⊕
default parameter set
Mass
238.1 M⊕
default parameter set
HAT-P-9
1540 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: Wang et al. 2019
Host Star
HAT-P-9
Stable across source rows
Discovery Year
2008
Stable across source rows
Orbital Period
3.92 day
3.92 to 3.92
Semi-Major Axis
0.05 au
0.05 to 0.05
Radius
15.61 Rearth
15.47 to 15.85
Mass
238.1 Mearth
212.9 to 247.9
Density
0.34 g/cm**3
0.34 to 0.37
Equilibrium Temperature
1540 K
1369 to 1540
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 15.61 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
HAT-P-9 b
15.61 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
10
Refs
10
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | — | — | — | Kokori et al. 2023 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.69 Rearth | 212.9 Mearth | — | Moutou et al. 2011 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.85 Rearth | — | 1369 K | ExoFOP |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | — | — | — | Ivshina & Winn 2022 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | — | — | — | Kokori et al. 2022 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | — | — | — | Patel & Espinoza 2022 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.61 Rearth | 238.1 Mearth | 1540 K | Wang et al. 2019 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.47 Rearth | 247.3 Mearth | 1540 K | Southworth 2012 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.69 Rearth | 247.9 Mearth | 1530 K | Shporer et al. 2009 |
| 2008 | Transit | HATNet | Canon 200mm f/1.8L | 3.92 day | 15.69 Rearth | 241.9 Mearth | — | Bonomo et al. 2017 |