Lacaille 9352 c
Planet· orbits Lacaille 9352
Lacaille 9352 c — a warm super-Earth (minimum mass ~6.5 Earth) on a 21.8-day orbit, near the inner edge of the star's temperate zone. Never imaged.
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Key facts
Minimum mass
3.88 × 10²⁵ kg
6.5 M⊕
Year
21.8 Earth days
Distance from Lacaille 9352
0.121 AU
Science
Physical
- Minimum mass (m·sin i)
- 3.88 × 10²⁵ kg · 6.5 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
- 0.121 AU
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.17
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 21.8 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 0.1 AU
- Computed from the orbital elements
- Aphelion
- 0.142 AU
- Computed from the orbital elements
- Mean orbital velocity
- 60.4 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- Presumed rocky or volatile-rich super-Earth (minimum mass ~6.5 Earth); never imaged.
- Cloud appearance
- Appearance based on ESO/M. Kornmesser's artist's concept. No spacecraft has imaged this world, so its real appearance is unknown — The banded clouds shown are a representation of its class, shown only in Visual mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 2.51 S⊕ · 2.51× the sunlight Earth receives
- Computed from Lacaille 9352's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 320 K (47 °C)
- Computed model value (no atmosphere assumed) — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'c' as the second planet found around its star, following the IAU convention of lettering planets in discovery order from 'b'.
Announced in 2020 alongside planet b from the RedDots/HARPS survey of Lacaille 9352.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.