Discovery Method
Radial Velocity
Consistent across records
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ExoplanetDetail
HD 4208 b
Host star HD 4208 • 833.0 d orbit
Records
5
archive rows
Discovery
2001
Radial Velocity
Radius
—
default parameter set
Mass
257.4 M⊕
default parameter set
HD 4208
temperature unconstrained
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: Barbato et al. 2018
Host Star
HD 4208
Stable across source rows
Discovery Year
2001
Stable across source rows
Orbital Period
833.0 day
828 to 833.0
Semi-Major Axis
1.66 au
1.63 to 1.70
Mass
257.4 Mearth
245.0 to 260.6
Provenance
Underlying measurements and references
Evidence Summary
Rows
5
Refs
5
Methods
1
Discoverystable
Facilitystable
Perioddisputed
Massdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2001 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 828 day | — | 255.5 Mearth | — | Butler et al. 2006 |
| 2001 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 833.0 day | — | 257.4 Mearth | — | Barbato et al. 2018 |
| 2001 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 829.5 day | — | 245.0 Mearth | — | Rosenthal et al. 2021 |
| 2001 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 828 day | — | 260.6 Mearth | — | Stassun et al. 2017 |
| 2001 | Radial Velocity | W. M. Keck Observatory | 10 m Keck I Telescope | 829 day | — | 254.3 Mearth | — | Vogt et al. 2002 |