47 UMa, une étoile G0V, possède 3 planètes confirmées.
Mesuré
Distance
environ 45 années-lumière
Type spectral de l'étoile
G0V
Planètes confirmées
3
Distance au Soleil
À propos 45 années-lumière. Pour la traverser :
Lumière45 ans
Vitesse de Voyager 1800,000 ans
Roule à 100 km/h486 millions 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 1996, par vitesse radiale (NASA Exoplanet Archive).
Ses planètes
47 UMa b — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 3 Earth years; about −58 °C, below freezing; found in 1996 by radial velocity.
47 UMa c — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 7 Earth years; about −110 °C, below freezing; found in 2001 by radial velocity.
47 UMa d — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 38 Earth years; about −180 °C, below freezing; found in 2009 by radial velocity.
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.