51 Pegasi b
E730517
51 Pegasi b is the first exoplanet discovered orbiting a Sun-like star, marking a breakthrough in the study of planetary systems beyond our own.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | exoplanet ⓘ |
| alternativeName |
51 Peg b
NERFINISHED
ⓘ
HD 217014 b NERFINISHED ⓘ |
| announcedAt |
Florence, Italy
NERFINISHED
ⓘ
Haute-Provence Observatory NERFINISHED ⓘ |
| atmosphereDetected | yes ⓘ |
| atmosphericCompositionEvidence |
carbon monoxide
ⓘ
water vapor ⓘ |
| constellation | Pegasus NERFINISHED ⓘ |
| declination | +20° 46′ 07.8″ ⓘ |
| discoveredBy |
Didier Queloz
NERFINISHED
ⓘ
Michel Mayor NERFINISHED ⓘ |
| discoveryDate | 1995-10-06 ⓘ |
| discoveryMethod | radial velocity ⓘ |
| discoveryYear | 1995 ⓘ |
| distanceFromEarth |
about 15.4 parsecs
ⓘ
about 50 light-years ⓘ |
| equilibriumTemperature | about 1200 K ⓘ |
| hasOrbitalOrientation | non-transiting ⓘ |
| hostStar | 51 Pegasi NERFINISHED ⓘ |
| hostStarAge | about 6.1 billion years ⓘ |
| hostStarAlternativeName | HD 217014 NERFINISHED ⓘ |
| hostStarApparentMagnitude | 5.49 ⓘ |
| hostStarEffectiveTemperature | about 5790 K ⓘ |
| hostStarMass | about 1.11 solar masses ⓘ |
| hostStarMetallicity | [Fe/H] ≈ +0.2 ⓘ |
| hostStarParallax | about 64.07 mas ⓘ |
| hostStarRadius | about 1.24 solar radii ⓘ |
| hostStarSpectralType | G2IV ⓘ |
| hostStarType | G-type main-sequence star ⓘ |
| impact |
challenged traditional planet formation theories
ⓘ
revolutionized exoplanet research ⓘ |
| locatedIn |
51 Pegasi planetary system
NERFINISHED
ⓘ
Milky Way ⓘ |
| mass | about 0.47 MJ ⓘ |
| minimumMass | about 0.47 Jupiter masses ⓘ |
| namedAfter | its host star 51 Pegasi ⓘ |
| orbitalEccentricity | approximately 0 ⓘ |
| orbitalPeriod | about 4.23 days ⓘ |
| orbits | 51 Pegasi NERFINISHED ⓘ |
| radialVelocitySemiAmplitude | about 56 m/s ⓘ |
| rightAscension | 22h 57m 27.98s ⓘ |
| semiMajorAxis | about 0.052 AU ⓘ |
| significance |
first exoplanet discovered orbiting a Sun-like star
ⓘ
first hot Jupiter discovered around a Sun-like star ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.