Kepler-186 d
Planet· orbits Kepler-186
Kepler-186 d — a super-Earth (1.40 Earth radii) on a 13-day orbit. Its size is measured; its mass is size-estimated, so no density is quoted. Likely rocky, warm but cooler than the inner two. Never imaged.
Open in 3D viewSee Kepler-186 d in the live, interactive 3D map
Key facts
Radius
8,919 km
1.4× wider than Earth
Year
13.34 Earth days
Distance from Kepler-186
11,683,594 km
Science
Physical
- Radius
- 8,919 km · 1.4× wider than Earth
Orbital
- Semi-major axis
- 11,683,594 km
- From the NASA Exoplanet Archive (transit + orbit fit)
- Eccentricity
- 0
- From the NASA Exoplanet Archive (transit + orbit fit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (transit + orbit fit)
- Orbital period
- 13.3 days
- From the NASA Exoplanet Archive (transit + orbit fit)
- Perihelion
- 11,683,594 km
- Computed from the orbital elements
- Aphelion
- 11,683,594 km
- Computed from the orbital elements
- Mean orbital velocity
- 63.7 km/s
- Computed from the orbital elements
Composition
- Bulk composition
- A super-Earth (1.40 Earth radii); its size is measured, its mass only size-estimated, so no density is quoted. Likely rocky, warm but cooler than the inner two. Never imaged.
- Surface appearance
- Appearance based on NASA/JPL-Caltech'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
- 6.78 S⊕ · 6.78× the sunlight Earth receives
- Computed from Kepler-186's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
- Equilibrium temperature
- 379 K (106 °C)
- Computed model value for its 13-day orbit — not measured.
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 found (the star is the unwritten 'a'); no IAU proper name has been assigned.
One of the four confirmed inner planets of Kepler-186 (2014).
Images
No telescope has imaged this world — it is known only from the tiny dip it makes crossing its star. Only its host system has been pictured (see the system view); its true surface appearance is unknown.