Gliese 581 star system

E269494

planetary 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.

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All labels observed (5)

Label	Occurrences
Gliese 581	5
GJ 581	1
Gliese 581 planetary system	1
Gliese 581 star system canonical	1
Gliese 581 system	1

How this entity was disambiguated

This entity first appeared as the object of triple T2459091 — 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: Gliese 581 star system
Context triple: [A Message From Earth, destinationStarSystem, Gliese 581 star system]

A. 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.
B. 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.
C. Epsilon Eridani
Epsilon Eridani is a nearby young K-type main-sequence star in the constellation Eridanus, notable for its debris disk and status as a prominent target in exoplanet and SETI searches.
D. Aldebaran planetary system
The Aldebaran planetary system is a stellar system centered on the bright orange giant star Aldebaran, located in the constellation Taurus and known to host at least one candidate exoplanet.
E. 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.
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: Gliese 581 star system
Target entity description: 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.

A. 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.
B. 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.
C. Epsilon Eridani
Epsilon Eridani is a nearby young K-type main-sequence star in the constellation Eridanus, notable for its debris disk and status as a prominent target in exoplanet and SETI searches.
D. Aldebaran planetary system
The Aldebaran planetary system is a stellar system centered on the bright orange giant star Aldebaran, located in the constellation Taurus and known to host at least one candidate exoplanet.
E. 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.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	planetary system ⓘ
apparentMagnitude	10.56 ⓘ
catalogIdentifier	Gliese 581 star system self-linksurface differs ⓘ surface form: GJ 581 Gliese 581 star system self-linksurface differs ⓘ surface form: Gliese 581 HO Librae ⓘ
declination	−07° 43′ 20″ ⓘ
discoveryMethodOfPlanets	radial velocity ⓘ
distanceFromEarth	approximately 20.3 light-years ⓘ approximately 6.2 parsecs ⓘ
hasCandidateExoplanet	Gliese 581f ⓘ Gliese 581g ⓘ Gliese 581h ⓘ
hasControversialPlanetClaims	Gliese 581f ⓘ Gliese 581g ⓘ Gliese 581h ⓘ
hasEffectiveTemperature	approximately 3500 K ⓘ
hasExoplanet	Gliese 581b ⓘ Gliese 581c ⓘ Gliese 581d ⓘ Gliese 581e ⓘ
hasHabitableZonePlanetsStatus	disputed habitability of some planets ⓘ
hasHostStarVariabilityType	flare star (low activity) ⓘ
hasLuminosityRelativeToSun	approximately 0.013 solar luminosities ⓘ
hasMassRelativeToSun	approximately 0.31 solar masses ⓘ
hasNumberOfConfirmedPlanets	at least four ⓘ
hasPlanetaryOrbitalDetectionTechnique	Doppler spectroscopy ⓘ
hasPlanetarySystemStatus	well-studied exoplanet system ⓘ
hasPrimaryStar	Gliese 581 star system self-linksurface differs ⓘ surface form: Gliese 581
hasProperMotion	high proper motion star ⓘ
hasRadialVelocity	approximately −9 km/s ⓘ
hasRadiusRelativeToSun	approximately 0.29 solar radii ⓘ
hasResearchInterest	exoplanet habitability ⓘ radial velocity signal analysis ⓘ stellar activity impact on planets ⓘ
hasStellarClass	M3V ⓘ
hasStellarType	red dwarf system ⓘ
locatedInConstellation	Libra ⓘ
messageTransmissionYear	1999 ⓘ 2003 ⓘ 2008 ⓘ
metallicity	sub-solar ⓘ
notableFor	early super-Earth exoplanet discoveries ⓘ potentially habitable exoplanets ⓘ target of interstellar messages from Earth ⓘ
partOf	Milky Way ⓘ
rightAscension	15h 19m 26.8s ⓘ
spectralType	M3V ⓘ
wasTargetOfMessage	A Message From Earth ⓘ Cosmic Call ⓘ surface form: Cosmic Call 2

How these facts were elicited