|
gptkbp:instance_of
|
gptkb:star
|
|
gptkbp:age
|
approximately 4.5 billion years
|
|
gptkbp:area
|
1.2 solar radii
|
|
gptkbp:average_temperature
|
approximately 5800 K
|
|
gptkbp:contains
|
gptkb:Kepler-18b
gptkb:Kepler-18
gptkb:Kepler-18c
gptkb:Kepler-18d
gptkb:star
|
|
gptkbp:country
|
gptkb:theorem
|
|
gptkbp:diameter
|
Kepler-18b: 1.1 Jupiter radii
Kepler-18c: 1.5 Earth radii
Kepler-18d: 2.0 Earth radii
|
|
gptkbp:discovered_by
|
gptkb:Kepler_Space_Telescope
transit method
|
|
gptkbp:distance
|
approximately 300 light years
|
|
gptkbp:eccentricity
|
0.0
|
|
gptkbp:first_appearance
|
gptkb:2011
|
|
gptkbp:growth_habit
|
gptkb:theorem
|
|
gptkbp:has_luminosity
|
1.5 solar luminosities
|
|
gptkbp:has_spectral_type
|
G5 V
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Kepler-18 system
|
|
gptkbp:is_part_of
|
gptkb:Milky_Way_galaxy
|
|
gptkbp:located_in
|
constellation Cygnus
|
|
gptkbp:mass
|
1.1 solar masses
Kepler-18b: 0.7 Jupiter masses
Kepler-18c: 8.0 Earth masses
Kepler-18d: 4.0 Earth masses
|
|
gptkbp:metallicity
|
solar metallicity
|
|
gptkbp:orbital_inclination
|
approximately 89 degrees
|
|
gptkbp:orbital_period
|
gptkb:theorem
gptkb:Kepler-18
gptkb:engine
super-Earth
approximately 25 days
sub-Neptune
Kepler-18b: 3.52 days
Kepler-18c: 7.64 days
Kepler-18d: 14.43 days
|
|
gptkbp:universe
|
gptkb:theorem
|
|
gptkbp:year_created
|
gptkb:2011
|
|
gptkbp:bfsParent
|
gptkb:Kepler_mission
|
|
gptkbp:bfsLayer
|
4
|