Lacaille 9352 b
Planet· orbits Lacaille 9352
Lacaille 9352 b — a hot super-Earth (minimum mass ~3.9 Earth) on a 9.3-day orbit, one of the first two planets found here. Too hot for liquid water; never imaged.
Open in 3D viewSee Lacaille 9352 b in the live, interactive 3D map
Key facts
Minimum mass
2.33 × 10²⁵ kg
3.9 M⊕
Year
9.26 Earth days
Distance from Lacaille 9352
10,217,535 km
Science
Physical
- Minimum mass (m·sin i)
- 2.33 × 10²⁵ kg · 3.9 M⊕
- Radial-velocity detection measures m·sin i; the true mass depends on the unknown orbital inclination.
- Radius
- Not measured
- No transit — the radius is a model estimate; true size unknown.
Orbital
- Semi-major axis
- 10,217,535 km
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.14
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 9.3 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 8,787,080 km
- Computed from the orbital elements
- Aphelion
- 11,647,989 km
- Computed from the orbital elements
- Mean orbital velocity
- 80.2 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- Presumed rocky/super-Earth (minimum mass ~3.9 Earth); 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
- 7.89 S⊕ · 7.89× the sunlight Earth receives
- Computed from Lacaille 9352's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 426 K (153 °C)
- Computed model value (no atmosphere assumed) — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'b' as the first planet found around its star, following the IAU convention of lettering planets in discovery order from 'b'.
Announced in 2020 by the RedDots team from HARPS radial velocities — one of the closest transiting-search targets, though it has not been seen to transit.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.