Discovery Method
Transit
Consistent across records
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ExoplanetDetail
HD 219666 b
Host star HD 219666 • 4.90 R⊕ • 6.03 d orbit
Records
6
archive rows
Discovery
2018
Transit
Radius
4.90 R⊕
default parameter set
Mass
17.60 M⊕
default parameter set
HD 219666
1076 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: Murphy et al. 2025
Host Star
HD 219666
Stable across source rows
Discovery Year
2018
Stable across source rows
Orbital Period
6.03 day
6.03 to 6.04
Radius
4.90 Rearth
4.24 to 4.90
Mass
17.60 Mearth
16.60 to 17.60
Equilibrium Temperature
1076 K
838 to 1377.9
Scale Comparison
Radius against familiar reference worlds
Current adopted radius: 4.90 R⊕ • circles scaled linearly by radius
Earth
1.0 R⊕ baseline
HD 219666 b
4.90 R⊕
Jupiter
11.2 R⊕ reference
Provenance
Underlying measurements and references
Evidence Summary
Rows
6
Refs
6
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Radiusdisputed
Massdisputed
Eq. Tempdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.03 day | 4.90 Rearth | 17.60 Mearth | 1076 K | Murphy et al. 2025 |
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.04 day | 4.24 Rearth | — | 838 K | Oddo et al. 2023 |
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.03 day | 4.66 Rearth | — | 1377.9 K | ExoFOP |
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.04 day | — | — | — | Patel & Espinoza 2022 |
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.04 day | 4.71 Rearth | 16.60 Mearth | 1073 K | Esposito et al. 2019 |
| 2018 | Transit | Transiting Exoplanet Survey Satellite (TESS) | 0.1 m TESS Telescope | 6.03 day | — | — | — | Kokori et al. 2023 |