L'étoile de Barnard, une étoile M3.5-4 V, possède 4 planètes confirmées.
Mesuré
Distance
environ 6 années-lumière
Type spectral de l'étoile
M3.5-4 V
Planètes confirmées
4
Distance au Soleil
À propos 6 années-lumière. Pour la traverser :
Lumière6 ans
Vitesse de Voyager 1107,000 ans
Roule à 100 km/h64.8 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 2024, par vitesse radiale (NASA Exoplanet Archive).
Ses planètes
Barnard c — 0.7 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 4 days; about 130 °C, hotter than boiling water; found in 2025 by radial velocity.
Barnard b — 0.7 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 3 days; about 170 °C, hotter than boiling water; found in 2024 by radial velocity.
Barnard e — 0.6 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 7 days; about 67 °C, between freezing and boiling; found in 2025 by radial velocity.
Barnard d — 0.7 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 2 days; about 210 °C, hotter than boiling water; found in 2025 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.