L 98-59 f
Planet· orbits L 98-59
L 98-59 f - a super-Earth (minimum mass ~2.8 Earth) orbiting in the habitable zone every 23 days. RV-only: minimum mass, model-estimate size, never imaged - the temperate outer member of this five-planet family.
Open in 3D viewSee L 98-59 f in the live, interactive 3D map
Key facts
Minimum mass
1.67 × 10²⁵ kg
2.8 M⊕
Year
23.06 Earth days
Distance from L 98-59
0.105 AU
Science
Physical
- Minimum mass (m·sin i)
- 1.67 × 10²⁵ kg · 2.8 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 ~2.8-Earth-mass world; true size unknown.
Orbital
- Semi-major axis
- 0.105 AU
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.044
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 23.1 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 0.101 AU
- Computed from the orbital elements
- Aphelion
- 0.11 AU
- Computed from the orbital elements
- Mean orbital velocity
- 49.6 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A super-Earth of minimum mass ~2.8 Earth orbiting in the habitable zone, confirmed by 2025; 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
- 1.1 S⊕ · 1.1× the sunlight Earth receives
- Computed from L 98-59's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 285 K (12 °C)
- Computed model value for its habitable-zone orbit — not measured; actual temperature depends on any atmosphere.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'f' 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').
Confirmed by 2025 from continued ESPRESSO radial-velocity monitoring - a habitable-zone planet completing the known system.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.