|
gptkbp:instance_of
|
gptkb:exoplanet
|
|
gptkbp:atmosphere
|
gptkb:unknown
potentially hydrogen-rich
potentially thick atmosphere
|
|
gptkbp:average_temperature
|
gptkb:unknown
approximately 1200 K
approximately 1000 K
estimated 1200 K
|
|
gptkbp:companion_planets
|
gptkb:Kepler-18c
|
|
gptkbp:conducts_research_on
|
planetary formation
exoplanet studies
|
|
gptkbp:contains_star
|
G-type star
|
|
gptkbp:country
|
gptkb:unknown
gptkb:hot_Jupiter
Kepler-18 planetary system
|
|
gptkbp:discovered_by
|
gptkb:Kepler_Space_Telescope
|
|
gptkbp:discovery
|
gptkb:NASA's_Kepler_mission
gptkb:NASA_Ames_Research_Center
transit method
transit photometry
transit
Kepler mission team
2011 Kepler-18b discovery paper
first confirmed planet in the system.
|
|
gptkbp:discovery_instrument
|
gptkb:Kepler_Space_Telescope
|
|
gptkbp:discovery_year
|
gptkb:2011
2011-01-04
|
|
gptkbp:distance_from_earth
|
approximately 300 light-years
|
|
gptkbp:eccentricity
|
gptkb:unknown
low
0.0
|
|
gptkbp:events
|
gptkb:unknown
|
|
gptkbp:growth_habit
|
no
not habitable
|
|
gptkbp:has_companion
|
gptkb:Kepler-18c
|
|
gptkbp:has_field
|
gptkb:unknown
|
|
gptkbp:has_radius
|
1.1 Jupiter radii
approximately 1.5 times that of Earth
approximately 2.5 Earth radii
|
|
gptkbp:has_spectral_type
|
not determined
|
|
gptkbp:hosts
|
gptkb:Kepler-18
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Kepler-18b
|
|
gptkbp:included
|
exoplanet databases
|
|
gptkbp:investigates
|
orbital dynamics
|
|
gptkbp:investment
|
gptkb:unknown
|
|
gptkbp:is_analyzed_in
|
potential habitability
|
|
gptkbp:is_compared_to
|
other exoplanets
|
|
gptkbp:is_considered
|
a hot Jupiter
exoplanet habitability discussions
|
|
gptkbp:is_discussed_in
|
scientific conferences
|
|
gptkbp:is_evaluated_by
|
atmospheric conditions
|
|
gptkbp:is_examined_in
|
stellar interactions
|
|
gptkbp:is_exoplanet
|
gptkb:true
|
|
gptkbp:is_explored_in
|
scientific research teams
|
|
gptkbp:is_featured_in
|
astronomy documentaries
|
|
gptkbp:is_gas_giant
|
gptkb:true
yes
|
|
gptkbp:is_giant_planet
|
gptkb:true
|
|
gptkbp:is_hot_jupiter
|
gptkb:true
|
|
gptkbp:is_in_star_system
|
gptkb:Kepler-18_system
|
|
gptkbp:is_inhabited_by
|
false
no
|
|
gptkbp:is_known_for
|
its size and mass
|
|
gptkbp:is_located_in
|
gptkb:exoplanet
gptkb:Milky_Way
|
|
gptkbp:is_monitored_by
|
space observatories
|
|
gptkbp:is_notable_for
|
its close orbit to host star
|
|
gptkbp:is_noted_for
|
its discovery significance
|
|
gptkbp:is_observed_in
|
ground-based telescopes
|
|
gptkbp:is_orbiting_star
|
gptkb:Kepler-18
|
|
gptkbp:is_part_of
|
gptkb:Kepler-18_system
|
|
gptkbp:is_part_of_exoplanet_catalog
|
yes
|
|
gptkbp:is_part_of_exoplanet_research
|
yes
|
|
gptkbp:is_referenced_in
|
gptkb:literature
|
|
gptkbp:is_searched_for
|
potential moons
|
|
gptkbp:is_studied_for
|
atmospheric composition
|
|
gptkbp:is_studied_in
|
various telescopes
|
|
gptkbp:is_terrestrial
|
false
|
|
gptkbp:is_tidal_locked
|
gptkb:unknown
|
|
gptkbp:is_utilized_in
|
educational purposes
|
|
gptkbp:is_visible_from
|
false
no
|
|
gptkbp:lighting
|
observed by Kepler spacecraft
|
|
gptkbp:location
|
gptkb:Cygnus_constellation
|
|
gptkbp:mass
|
larger than Earth
approximately 10.4 Earth masses
approximately 600 light years
approximately 1.9 times that of Earth
0.7 Jupiter masses
approximately 10.2 Earth masses
between 10 and 11 Earth masses
greater than 10 Earth masses
1.9 times that of Earth
|
|
gptkbp:measures
|
orbital characteristics
|
|
gptkbp:module
|
gptkb:unknown
|
|
gptkbp:notable_galaxies
|
gptkb:Milky_Way
gptkb:Milky_Way_Galaxy
|
|
gptkbp:orbit_type
|
gptkb:Kepler-18
|
|
gptkbp:orbital_altitude
|
0.045 AU
0.045 AU from host star
high orbital velocity
influenced by nearby planets
0.11 AU from host star
|
|
gptkbp:orbital_inclination
|
gptkb:unknown
88.5 degrees
approximately 88 degrees
|
|
gptkbp:orbital_period
|
gptkb:unknown
stable orbit
3.1 days
3.52 days
close to host star
2:1 with Kepler-18c
|
|
gptkbp:orbital_resonance_details
|
2:1 with Kepler-18c and Kepler-18d
|
|
gptkbp:population_density
|
gptkb:unknown
approximately 5.5 g/cm³
|
|
gptkbp:power_source
|
unlikely
|
|
gptkbp:research
|
Kepler light curves
|
|
gptkbp:ring_name
|
false
|
|
gptkbp:rotation_period
|
gptkb:unknown
|
|
gptkbp:scientific_classification
|
a gas giant exoplanet
|
|
gptkbp:season
|
gptkb:unknown
|
|
gptkbp:semi_major_axis
|
0.04 AU
0.045 AU
0.11 AU
|
|
gptkbp:stellar_flux
|
high stellar flux
|
|
gptkbp:surface
|
gptkb:unknown
false
higher than Earth's
approximately 10.4 g
|
|
gptkbp:system
|
gptkb:Kepler-18_system
approximately 2 billion years
|
|
gptkbp:targets
|
future missions
|
|
gptkbp:type
|
gptkb:hot_Jupiter
|
|
gptkbp:weather_conditions
|
high temperatures
|
|
gptkbp:year
|
3.52 days
3.52 Earth days
|
|
gptkbp:zone
|
false
|
|
gptkbp:bfsParent
|
gptkb:Kepler-18_system
|
|
gptkbp:bfsLayer
|
5
|