Kepler-11 c
Planet· orbits Kepler-11
Kepler-11 c — a sub-Neptune (2.87 R⊕) on a 13-day orbit. Its TTV-measured mass (~2.9 M⊕) gives a very low density — a puffy, gas-rich world. Never imaged.
Open in 3D viewSee Kepler-11 c in the live, interactive 3D map
Key facts
Mass
1.73 × 10²⁵ kg
2.9 M⊕
Radius
18,285 km
2.87× wider than Earth
Surface gravity
3.46 m/s²
35% of Earth's gravity
Year
13.02 Earth days
Distance from Kepler-11
0.107 AU
Science
Physical
- Mass
- 1.73 × 10²⁵ kg · 2.9 M⊕
- Radius
- 18,285 km · 2.87× wider than Earth
- Density
- 676 kg/m³ · 0.68× water
- Computed from mass and radius
- Surface gravity
- 3.46 m/s² · 35% of Earth's gravity
- Computed from mass and radius
- Escape velocity
- 11.2 km/s
- Computed from mass and radius
Orbital
- Semi-major axis
- 0.107 AU
- From the NASA Exoplanet Archive (transit + orbit fit)
- Eccentricity
- 0.026
- From the NASA Exoplanet Archive (transit + orbit fit)
- Inclination
- 0.00 °
- From the NASA Exoplanet Archive (transit + orbit fit)
- Orbital period
- 13.0 days
- From the NASA Exoplanet Archive (transit + orbit fit)
- Perihelion
- 0.104 AU
- Computed from the orbital elements
- Aphelion
- 0.11 AU
- Computed from the orbital elements
- Mean orbital velocity
- 89.4 km/s
- Computed from the orbital elements
Composition
- Cloud appearance
- Appearance based on NASA/JPL-Caltech'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
- 91.8 S⊕ · 91.8× the sunlight Earth receives
- Computed from Kepler-11's luminosity and the orbital distance (inverse-square; Earth's sunlight = 1).
Discovery & history
- Method
- Transit detection
- Name
- Designated 'c' under the IAU convention that letters a star's planets 'b', 'c', 'd'... in the order found (the star is the unwritten 'a'); no IAU proper name has been assigned.
One of six planets announced around Kepler-11 in 2011.
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.