Gliese 357 c
Planet· orbits Gliese 357
Gliese 357 c - a warm super-Earth (minimum mass ~3.4 Earth) on a 9-day orbit. Found by radial velocity, so its mass is a minimum and its size is a model estimate; never imaged.
Open in 3D viewSee Gliese 357 c in the live, interactive 3D map
Key facts
Minimum mass
2.03 × 10²⁵ kg
3.4 M⊕
Year
9.12 Earth days
Distance from Gliese 357
9,125,470 km
Science
Physical
- Minimum mass (m·sin i)
- 2.03 × 10²⁵ kg · 3.4 M⊕
- Radial-velocity detection measures m·sin i; the true mass depends on the unknown orbital inclination.
- Radius
- Not measured
- No transit — radius is a model estimate for a ~3.4-Earth-mass world; true size unknown.
Orbital
- Semi-major axis
- 9,125,470 km
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 9.1 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 9,125,470 km
- Computed from the orbital elements
- Aphelion
- 9,125,470 km
- Computed from the orbital elements
- Mean orbital velocity
- 72.7 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A warm super-Earth of minimum mass ~3.4 Earth; found by radial velocity, never imaged.
- Surface appearance
- Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The surface shown is an artistic representation, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 4.28 S⊕ · 4.28× the sunlight Earth receives
- Computed from Gliese 357's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 401 K (128 °C)
- Computed model value for its 9-day orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'c' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order they are discovered (the star itself is the unwritten 'a').
Revealed by radial-velocity follow-up of the transiting inner planet in 2019.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.