À propos 2,560 années-lumière. Pour la traverser :
Lumière2,560 ans
Vitesse de Voyager 145.4 millions d’années
Roule à 100 km/h27.6 milliards d'années
Voyager 1 à la vitesse à laquelle elle s'est éloignée au cours de l'année jusqu'à 2026-10-25 (JPL Horizons). En voiture : sans arrêt, sans jamais refaire le plein.
Méthode de découverte
Première planète découverte en 2012, par variations du temps de transit et transit (NASA Exoplanet Archive).
Ses planètes
Kepler-51 e — 2.2 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 260 days; found in 2024 by transit timing variations.
Kepler-51 d — 9.7 times Earth's width, Neptune-sized; its year lasts 130 days; about 110 °C, hotter than boiling water; found in 2014 by transit.
Kepler-51 c — 9 times Earth's width, Neptune-sized; its year lasts 85 days; about 170 °C, hotter than boiling water; found in 2012 by transit.
Kepler-51 b — 7.1 times Earth's width, Neptune-sized; its year lasts 45 days; about 270 °C, hotter than boiling water; found in 2012 by transit.
NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.