Discovery Method
Radial Velocity
Consistent across records
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ExoplanetDetail
HD 181720 b
Host star HD 181720 • 956 d orbit
Records
2
archive rows
Discovery
2009
Radial Velocity
Radius
—
default parameter set
Mass
127.1 M⊕
default parameter set
HD 181720
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: Stassun et al. 2017
Host Star
HD 181720
Stable across source rows
Discovery Year
2009
Stable across source rows
Orbital Period
956 day
single adopted value
Semi-Major Axis
1.85 au
1.78 to 1.85
Mass
127.1 Mearth
117.6 to 127.1
Provenance
Underlying measurements and references
Evidence Summary
Rows
2
Refs
2
Methods
1
Discoverystable
Facilitystable
Periodstable
Massdisputed
| Year | Method | Facility | Telescope | Period | Radius | Mass | Eq. Temp | Reference |
|---|---|---|---|---|---|---|---|---|
| 2009 | Radial Velocity | La Silla Observatory | 3.6 m ESO Telescope | 956 day | — | 117.6 Mearth | — | Santos et al. 2010 |
| 2009 | Radial Velocity | La Silla Observatory | 3.6 m ESO Telescope | 956 day | — | 127.1 Mearth | — | Stassun et al. 2017 |