Statements (54)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:atmosphere |
Kepler-21b: thick atmosphere
Kepler-21c: thick atmosphere |
| gptkbp:average_temperature |
Kepler-21b: high
Kepler-21c: high |
| gptkbp:contains |
gptkb:Kepler-21
gptkb:star |
| gptkbp:controls |
gptkb:Kepler-16_system
gptkb:Kepler-20_system gptkb:Kepler-22_system gptkb:Kepler-186_system Kepler-11 system |
| gptkbp:country |
2
formed in protoplanetary disk multi-planet system Kepler-21b: gas giant Kepler-21c: gas giant |
| gptkbp:diameter |
1.1 solar radii
|
| gptkbp:discovered_by |
gptkb:Kepler_Space_Telescope
transit method |
| gptkbp:distance |
approximately 300 light years
|
| gptkbp:eccentricity |
Kepler-21b: low
Kepler-21c: low |
| gptkbp:game_world |
gptkb:Kepler-21b
gptkb:Kepler-21c |
| gptkbp:growth_habit |
none known
|
| gptkbp:has_luminosity |
approximately 4.5 billion years
low variability 1.2 solar luminosities low activity |
| gptkbp:hosts |
1.1 solar masses
|
| https://www.w3.org/2000/01/rdf-schema#label |
Kepler-21 system
|
| gptkbp:location |
gptkb:Cygnus_constellation
|
| gptkbp:mass |
Kepler-21b: 0.5 Jupiter masses
Kepler-21b: 1.2 Jupiter radii Kepler-21c: 0.4 Jupiter masses Kepler-21c: 1.1 Jupiter radii |
| gptkbp:metallicity |
solar metallicity
|
| gptkbp:migration |
possible inward migration
|
| gptkbp:next_event |
gptkb:James_Webb_Space_Telescope
|
| gptkbp:notable_feature |
two confirmed exoplanets
|
| gptkbp:orbital_inclination |
approximately 90 degrees
|
| gptkbp:orbital_period |
approximately 25 days
Kepler-21b: 10.8 days Kepler-21c: 21.2 days |
| gptkbp:research |
distance from Earth
Kepler light curves faintness of host star |
| gptkbp:research_focus |
exoplanetary atmospheres
|
| gptkbp:serving_temperature |
approximately 5800 K
|
| gptkbp:significance |
study of exoplanets
|
| gptkbp:year_created |
gptkb:2011
|
| gptkbp:bfsParent |
gptkb:Kepler-21b
|
| gptkbp:bfsLayer |
5
|