Traduit par IA (Opus 5.5) à partir de la fiche anglaise. Les nombres, noms et sources sont inchangés.

Étoile avec 4 planètes connues

K2-285

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K2-285, une étoile K2 V, possède 4 planètes confirmées.

Mesuré

Distance: environ 505 années-lumière
Type spectral de l'étoile: K2 V
Planètes confirmées: 4

Distance au Soleil

À propos 505 années-lumière. Pour la traverser :

Lumière505 ans
Vitesse de Voyager 18.98 millions d’années
Roule à 100 km/h5.45 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 2018, par transit (NASA Exoplanet Archive).

Ses planètes

K2-285 b — 2.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 3 days; about 820 °C, hotter than boiling water; found in 2018 by transit.
K2-285 c — 3.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 7 days; about 470 °C, hotter than boiling water; found in 2018 by transit.
K2-285 d — 2.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 350 °C, hotter than boiling water; found in 2018 by transit.
K2-285 e — 2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 15 days; about 230 °C, hotter than boiling water; found in 2018 by transit.

The NASA Exoplanet Archive's page

Source

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.

Chaque catalogue utilisé par Ouranos est cité dans la page des crédits.

Distance au Soleil

À propos 505 années-lumière. Pour la traverser :

Lumière505 ans

Vitesse de Voyager 18.98 millions d’années

Roule à 100 km/h5.45 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.

Ses planètes

K2-285 b — 2.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 3 days; about 820 °C, hotter than boiling water; found in 2018 by transit.

K2-285 c — 3.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 7 days; about 470 °C, hotter than boiling water; found in 2018 by transit.

K2-285 d — 2.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 350 °C, hotter than boiling water; found in 2018 by transit.

K2-285 e — 2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 15 days; about 230 °C, hotter than boiling water; found in 2018 by transit.

Source

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.