Kepler-452b
E378259
Kepler-452b is an exoplanet often dubbed "Earth’s cousin" because it orbits within the habitable zone of a Sun-like star and shares several Earth-like characteristics.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Kepler-452b canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3631156 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Kepler-452b Context triple: [Kepler space telescope, notableDiscovery, Kepler-452b]
-
A.
Kepler-22b
Kepler-22b is an exoplanet located in its star’s habitable zone and was one of the first such worlds discovered by NASA’s Kepler space telescope.
-
B.
Gliese 581c
Gliese 581c is an exoplanet orbiting the red dwarf star Gliese 581 in the constellation Libra, once considered a potentially habitable “super-Earth” due to its size and location in its star’s habitable zone.
-
C.
Epsilon Eridani b
Epsilon Eridani b is a nearby Jupiter-like exoplanet candidate orbiting the young K-type star Epsilon Eridani, making it one of the closest known potential exoplanets to Earth.
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D.
Tau Ceti
Tau Ceti is a nearby Sun-like star in the constellation Cetus, notable for its stability, potential planetary system, and historical importance as an early target in the search for extraterrestrial intelligence.
-
E.
Gliese 581 star system
The Gliese 581 star system is a nearby red dwarf system in the constellation Libra that gained prominence for its potentially habitable exoplanets and as a target for interstellar messages from Earth.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Kepler-452b Target entity description: Kepler-452b is an exoplanet often dubbed "Earth’s cousin" because it orbits within the habitable zone of a Sun-like star and shares several Earth-like characteristics.
-
A.
Kepler-22b
Kepler-22b is an exoplanet located in its star’s habitable zone and was one of the first such worlds discovered by NASA’s Kepler space telescope.
-
B.
Gliese 581c
Gliese 581c is an exoplanet orbiting the red dwarf star Gliese 581 in the constellation Libra, once considered a potentially habitable “super-Earth” due to its size and location in its star’s habitable zone.
-
C.
Epsilon Eridani b
Epsilon Eridani b is a nearby Jupiter-like exoplanet candidate orbiting the young K-type star Epsilon Eridani, making it one of the closest known potential exoplanets to Earth.
-
D.
Tau Ceti
Tau Ceti is a nearby Sun-like star in the constellation Cetus, notable for its stability, potential planetary system, and historical importance as an early target in the search for extraterrestrial intelligence.
-
E.
Gliese 581 star system
The Gliese 581 star system is a nearby red dwarf system in the constellation Libra that gained prominence for its potentially habitable exoplanets and as a target for interstellar messages from Earth.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
exoplanet
ⓘ
extrasolar planet ⓘ |
| announcedBy | NASA ⓘ |
| atmosphereStatus | atmosphere not yet directly detected ⓘ |
| catalog |
Kepler exoplanet catalog
ⓘ
linked to:
Kepler Objects of Interest
|
| catalogDesignation | KOI-7016.01 ⓘ |
| dataSource | Kepler photometric observations ⓘ |
| discoveredBy | Kepler space telescope ⓘ |
| discoveryMethod | transit method ⓘ |
| discoveryMission |
Kepler Mission
ⓘ
linked to:
Kepler
|
| discoverySignificance | first near-Earth-size planet found in the habitable zone of a Sun-like star ⓘ |
| discoveryYear | 2015 ⓘ |
| distanceFromEarth |
about 1400 light-years
ⓘ
approximately 430 parsecs ⓘ |
| equilibriumTemperature | similar to Earth’s equilibrium temperature ⓘ |
| exoplanetStatus | confirmed exoplanet ⓘ |
| followUpObservations | ground-based spectroscopy of host star ⓘ |
| habitabilityStatus | potentially rocky super-Earth in habitable zone ⓘ |
| hasTransit | yes ⓘ |
| hostStar | Kepler-452 ⓘ |
| hostStarAge |
about 6 billion years (approximate)
ⓘ
older than the Sun ⓘ |
| hostStarMetallicity | similar to or slightly higher than solar metallicity ⓘ |
| hostStarSimilarityToSun | Sun-like star ⓘ |
| hostStarType | G-type main-sequence star ⓘ |
| inHabitableZoneOf | Kepler-452 ⓘ |
| insolation | about 10 percent more than Earth ⓘ |
| lifeStatus | no evidence of life detected ⓘ |
| locatedInConstellation | Cygnus ⓘ |
| mass | likely several times Earth’s mass (model-dependent estimate) ⓘ |
| nickname |
Earth’s cousin
ⓘ
older, bigger cousin to Earth ⓘ |
| orbitalPeriod |
about 20 days longer than Earth’s year
ⓘ
approximately 385 days ⓘ |
| orbits | Kepler-452 ⓘ |
| partOf |
Kepler Objects of Interest catalog
ⓘ
linked to:
Kepler Objects of Interest
|
| potentialComposition | likely rocky with a substantial atmosphere (model-based) ⓘ |
| radius |
about 1.6 times Earth’s radius
ⓘ
super-Earth-size ⓘ |
| receivesStellarFlux | slightly more stellar flux than Earth receives from the Sun ⓘ |
| semiMajorAxis | about 1.05 astronomical units ⓘ |
| similarityToEarth |
Earth-like insolation
ⓘ
Earth-like orbital period ⓘ orbits a Sun-like star in the habitable zone ⓘ |
| skyLocation | in the field of view of the Kepler spacecraft ⓘ |
| surfaceConditions | unknown ⓘ |
| surfaceGravity | estimated higher than Earth’s gravity ⓘ |
| transitDepth | consistent with a 1.6 Earth-radius planet ⓘ |
| waterPresence | unknown ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Kepler-452b Description of subject: Kepler-452b is an exoplanet often dubbed "Earth’s cousin" because it orbits within the habitable zone of a Sun-like star and shares several Earth-like characteristics.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.