Gliese 581b
E931692
Gliese 581b is a massive, close-orbiting exoplanet in the Gliese 581 system, notable as one of the early and well-studied planets discovered around a red dwarf star.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
exoplanet
ⓘ
extrasolar planet ⓘ giant planet ⓘ hot Neptune ⓘ |
| announcedBy | European Southern Observatory NERFINISHED ⓘ |
| catalogDesignation |
GJ 581 b
NERFINISHED
ⓘ
Gl 581 b NERFINISHED ⓘ |
| declination | −07° 43′ 20″ (host star) ⓘ |
| discoveredBy |
Geneva Extrasolar Planet Search team
NERFINISHED
ⓘ
Michel Mayor NERFINISHED ⓘ Stéphane Udry NERFINISHED ⓘ |
| discoveryDate | 2005-08-25 ⓘ |
| discoveryMethod | radial velocity ⓘ |
| discoveryYear | 2005 ⓘ |
| distanceFromEarth |
approximately 20.3 light-years
ⓘ
approximately 6.2 parsecs ⓘ |
| equilibriumTemperature | high ⓘ |
| equilibriumTemperatureCategory | too hot for liquid water on surface ⓘ |
| followUpObservations | extensive radial-velocity monitoring ⓘ |
| habitabilityStatus | not in habitable zone ⓘ |
| hasAlternativeName | GJ 581 b NERFINISHED ⓘ |
| hasAtmosphere | likely (inferred, not directly detected) ⓘ |
| hostStar | Gliese 581 NERFINISHED ⓘ |
| hostStarApparentMagnitude | 10.56 ⓘ |
| hostStarConstellation | Libra NERFINISHED ⓘ |
| hostStarEffectiveTemperature | approximately 3480 K ⓘ |
| hostStarMass | approximately 0.31 solar masses ⓘ |
| hostStarMetallicity | sub-solar metallicity ⓘ |
| hostStarRadius | approximately 0.29 solar radii ⓘ |
| hostStarSpectralType | M3V ⓘ |
| hostStarType | red dwarf ⓘ |
| locatedIn | Libra constellation NERFINISHED ⓘ |
| massCategory | Neptune-mass planet ⓘ |
| memberOf | Gliese 581 planetary system NERFINISHED ⓘ |
| minimumMass |
approximately 0.054 Jupiter masses
ⓘ
approximately 15.8 Earth masses ⓘ |
| notableFor |
being one of the earliest exoplanets discovered around a red dwarf star
ⓘ
being one of the first well-studied planets in the Gliese 581 system ⓘ |
| orbitalEccentricity | low eccentricity ⓘ |
| orbitalPeriod | approximately 5.37 days ⓘ |
| orbits | Gliese 581 NERFINISHED ⓘ |
| positionInSystem | innermost confirmed planet of Gliese 581 system (as originally reported) ⓘ |
| radialVelocitySemiAmplitude | approximately 12.5 m/s ⓘ |
| researchInterest |
dynamics of compact multi-planet systems
ⓘ
planet formation around low-mass stars ⓘ |
| rightAscension | 15h 19m 26s (host star) ⓘ |
| semiMajorAxis | approximately 0.041 AU ⓘ |
| systemMultiplicity | multi-planet system ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.