Discovery Method
Transit
Consistent across records
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ExoplanetDetail
HD 191939 b
Host star HD 191939 • 3.41 R⊕ • 8.88 d orbit
Records
7
archive rows
Discovery
2020
Transit
Radius
3.41 R⊕
default parameter set
Mass
10 M⊕
default parameter set
HD 191939
880 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: Orell-Miquel et al. 2023
Host Star
HD 191939
Stable across source rows
Discovery Year
2020
Stable across source rows
Orbital Period
8.88 day
8.88 to 8.88
Semi-Major Axis
0.08 au
0.08 to 0.08
Radius
3.41 Rearth
3.21 to 3.42
Mass
10 Mearth
9.60 to 10.40
Density
1.40 g/cm**3
1.34 to 1.50
Equilibrium Temperature
880 K
777 to 893
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 3.41 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
HD 191939 b
3.41 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
7
Refs
7
Methods
1
Discoverystable
Facilitystable
Periodstable
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | 3.40 Rearth | 9.60 Mearth | 818.7 K | Polanski et al. 2024 |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | 3.21 Rearth | — | 777 K | ExoFOP |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | 3.42 Rearth | — | 812 K | Badenas-Agusti et al. 2020 |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | 3.39 Rearth | 10.40 Mearth | 893 K | Lubin et al. 2022 |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | — | 9.66 Mearth | — | Lubin et al. 2024 |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | — | — | — | Kokori et al. 2023 |
| 2020 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 8.88 day | 3.41 Rearth | 10 Mearth | 880 K | Orell-Miquel et al. 2023 |