Gliese 581d
E935193
Gliese 581d is a potentially rocky exoplanet orbiting the red dwarf star Gliese 581, once considered one of the first known candidates for a habitable world outside our solar system.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
exoplanet
ⓘ
extrasolar planet ⓘ potentially rocky planet ⓘ super-Earth ⓘ |
| atmosphereRequirementForLiquidWater | dense CO2-rich atmosphere needed ⓘ |
| catalogDesignation |
GJ 581d
NERFINISHED
ⓘ
Gl 581d NERFINISHED ⓘ |
| comparedToEarth |
more massive than Earth
ⓘ
receives less stellar flux than Earth ⓘ |
| controversy |
existence questioned by some analyses
ⓘ
signal may be affected by stellar activity ⓘ |
| dataSource | radial velocity measurements from HARPS ⓘ |
| discoveredBy |
ESO HARPS team
NERFINISHED
ⓘ
Michel Mayor NERFINISHED ⓘ Stephane Udry NERFINISHED ⓘ Xavier Bonfils NERFINISHED ⓘ |
| discoveryFacility | ESO 3.6 m Telescope NERFINISHED ⓘ |
| discoveryInstrument | HARPS spectrograph NERFINISHED ⓘ |
| discoveryMethod | radial velocity ⓘ |
| discoveryObservatory | La Silla Observatory NERFINISHED ⓘ |
| discoveryYear | 2007 ⓘ |
| eccentricity | about 0.38 ⓘ |
| equilibriumTemperature_K | about 183 ⓘ |
| estimatedMass_EarthMasses | about 6 ⓘ |
| followUpStudies | subject of climate and habitability modeling ⓘ |
| habitabilityStatus |
early candidate for habitable exoplanet
ⓘ
later considered less likely to be habitable ⓘ |
| hostStar | Gliese 581 NERFINISHED ⓘ |
| hostStarConstellation | Libra NERFINISHED ⓘ |
| hostStarDistanceFromEarth_ly | about 20.3 ⓘ |
| hostStarSpectralType | M3V ⓘ |
| hostStarType | red dwarf ⓘ |
| locatedIn |
Gliese 581 system
NERFINISHED
ⓘ
Milky Way ⓘ Solar neighborhood NERFINISHED ⓘ |
| mediaNotability | one of the first widely publicized potentially habitable exoplanets ⓘ |
| minimumMass_EarthMasses | about 5.6 ⓘ |
| orbitalPeriod_days | about 66.8 ⓘ |
| orbits | Gliese 581 NERFINISHED ⓘ |
| otherPlanetsInSystem |
Gliese 581b
NERFINISHED
ⓘ
Gliese 581c NERFINISHED ⓘ Gliese 581e NERFINISHED ⓘ |
| partOf | Gliese 581 planetary system NERFINISHED ⓘ |
| positionRelativeToHabitableZone | outer edge of habitable zone (under some models) ⓘ |
| radialVelocitySemiAmplitude_m_s | about 2.0 ⓘ |
| semiMajorAxis_AU | about 0.22 ⓘ |
| surfaceType | potentially rocky ⓘ |
| systemHasOtherPlanets | yes ⓘ |
| tidalLockingStatus | possibly tidally locked ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.