L 98-59 d
Planet· orbits the Sun
L 98-59 d - a transiting planet (~1.6 Earth masses, ~1.6 Earth radii) on a 7.5-day orbit, less dense than its siblings - likely volatile-rich. Its transit gives a measured size and density; never imaged.
Open in 3D viewSee L 98-59 d in the live, interactive 3D map
Key facts
Mass
9.79 × 10²⁴ kg
1.64 M⊕
Radius
10,366 km
1.63× wider than Earth
Surface gravity
6.08 m/s²
62% of Earth's
Year
7.45 Earth days
Distance from L 98-59
7,390,135 km
Science
Physical
- Mass
- 9.79 × 10²⁴ kg · 1.64 M⊕
- Radius
- 10,366 km · 1.63× wider than Earth
- Density
- 2,099 kg/m³ · 2.1× water
- Surface gravity
- 6.08 m/s² · 62% of Earth's
- Escape velocity
- 11.2 km/s
Orbital
- Semi-major axis
- 7,390,135 km
- Eccentricity
- 0.006
- Inclination
- 0.00 °
- Orbital period
- 7.5 days
- Perihelion
- 7,345,794 km
- Aphelion
- 7,434,476 km
- Mean orbital velocity
- 72.1 km/s
Composition
- Bulk composition
- A planet of ~1.6 Earth masses and ~1.6 Earth radii — its measured density is lower than its rocky siblings', pointing to a volatile-rich make-up. 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 Vision mode; Realism shows a plain spectral colour.
Radiation & temperature
- Insolation
- 5 S⊕ · 5× the sunlight Earth receives
- Equilibrium temperature
- 416 K (143 °C)
Discovery & history
- Method
- Transit detection
- Name
- Designated 'd' 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').
The outermost of the three transiting planets found by TESS in 2019, weighed by ESPRESSO.
Images
No official imagery available — this object has never been visited and no officially-licensed depiction exists.