|
gptkbp:instance_of
|
gptkb:exoplanet
|
|
gptkbp:atmosphere
|
gptkb:unknown
|
|
gptkbp:average_temperature
|
approximately 800 K
|
|
gptkbp:contains_star
|
G-type star
|
|
gptkbp:country
|
super-Earth
Kepler-20 planetary system
|
|
gptkbp:discovered_by
|
gptkb:Kepler_Space_Telescope
|
|
gptkbp:discovery
|
gptkb:The_Astrophysical_Journal
transit method
2011 Ap J 736, 19
Geoffrey W. Marcy et al.
first confirmed multi-planet system with Earth-sized planets.
|
|
gptkbp:discovery_year
|
gptkb:2011
December 20, 2011
|
|
gptkbp:eccentricity
|
0.0
|
|
gptkbp:growth_habit
|
not habitable
|
|
gptkbp:has_radius
|
0.87 Earth radii
0.54 Earth radii
|
|
gptkbp:hosts
|
gptkb:Kepler-20
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Kepler-20e
|
|
gptkbp:lighting
|
observed
observed in 2009
|
|
gptkbp:mass
|
4.6 Earth masses
0.87 Earth masses
less massive than Earth
|
|
gptkbp:orbit_type
|
gptkb:Kepler-20
|
|
gptkbp:orbital_altitude
|
circular
approximately 100 km/h
0.047 AU from host star
|
|
gptkbp:orbital_inclination
|
89.5 degrees
|
|
gptkbp:orbital_period
|
1:1 with Kepler-20f
6.1 days
|
|
gptkbp:population_density
|
gptkb:unknown
approximately 5.5 g/cm³
|
|
gptkbp:position
|
in the habitable zone of its star
|
|
gptkbp:position_in_system
|
second planet from the star
|
|
gptkbp:rotation_period
|
gptkb:unknown
|
|
gptkbp:seasonal_activities
|
gptkb:unknown
|
|
gptkbp:semi_major_axis
|
0.03 AU
0.047 AU
|
|
gptkbp:stellar_flux
|
approximately 10 times that of Earth
|
|
gptkbp:surface
|
gptkb:unknown
approximately 9.8 m/s²
|
|
gptkbp:system
|
gptkb:Kepler-20_system
|
|
gptkbp:type
|
super-Earth
rocky planet
|
|
gptkbp:year
|
6.1 Earth days
|
|
gptkbp:bfsParent
|
gptkb:Kepler_Space_Telescope
gptkb:Kepler_mission
|
|
gptkbp:bfsLayer
|
4
|