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.
Faits
Kepler-454 c a une température d'équilibre comprise entre −50 et +50 °C.
Méthode de découverte
Première planète découverte en 2015, par vitesse radiale et transit (NASA Exoplanet Archive).
Ses planètes
Kepler-454 d — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 11 Earth years; about −150 °C, below freezing; found in 2023 by radial velocity.
Kepler-454 b — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 11 days; about 640 °C, hotter than boiling water; found in 2015 by transit.
Kepler-454 c — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 520 days; about −23 °C, below freezing; found in 2015 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.