L 98-59 e
Planet· orbits L 98-59
L 98-59 e - a temperate super-Earth (minimum mass ~2.8 Earth) on a 13-day orbit. Found by radial velocity, so its mass is a minimum and its size a model estimate; it does not transit, and has never been imaged.
Open in 3D viewSee L 98-59 e in the live, interactive 3D map
Key facts
Minimum mass
1.68 × 10²⁵ kg
2.82 M⊕
Year
12.83 Earth days
Distance from L 98-59
10,651,368 km
Science
Physical
- Minimum mass (m·sin i)
- 1.68 × 10²⁵ kg · 2.82 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
- 10,651,368 km
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Eccentricity
- 0.012
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Orbital period
- 12.8 days
- From the NASA Exoplanet Archive (radial-velocity orbit)
- Perihelion
- 10,523,552 km
- Computed from the orbital elements
- Aphelion
- 10,779,185 km
- Computed from the orbital elements
- Mean orbital velocity
- 60.4 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A temperate super-Earth of minimum mass ~2.8 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
- 2.41 S⊕ · 2.41× the sunlight Earth receives
- Computed from L 98-59's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 347 K (74 °C)
- Computed model value for its 13-day orbit — not measured.
Discovery & history
- Method
- Radial-velocity detection (stellar wobble)
- Name
- Designated 'e' 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 ESPRESSO radial velocities in 2021 as a fourth, non-transiting planet.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.