Traducido por IA (Opus 5.5) a partir de la ficha en inglés. Los números, nombres y fuentes no se han modificado.

Estrella con 6 planetas conocidos

K2-138

Abrir en Ouranos

K2-138, una estrella G8 V, tiene 6 planetas confirmados.

Medido

Distancia: unos 661 años luz
Tipo espectral de la estrella: G8 V
Planetas confirmados: 6

Distancia al Sol

Acerca de 661 años luz. Para cruzarlo:

Luz661 años
Velocidad de la Voyager 111.7 millones de años
Conduciendo a 100 km/h7.13 mil millones de años

La Voyager 1 a la velocidad con la que se alejó durante el año hasta 2026-10-25 (JPL Horizons). Conduciendo: sin parar, sin repostar nunca.

Cómo se descubrió

Primer planeta descubierto en 2017, por tránsito (NASA Exoplanet Archive).

Sus planetas

K2-138 c — 2.3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 4 days; about 740 °C, hotter than boiling water; found in 2017 by transit.
K2-138 d — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 5 days; about 620 °C, hotter than boiling water; found in 2017 by transit.
K2-138 b — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 2 days; about 880 °C, hotter than boiling water; found in 2017 by transit.
K2-138 e — 3.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 8 days; about 480 °C, hotter than boiling water; found in 2017 by transit.
K2-138 g — 3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 42 days; about 170 °C, hotter than boiling water; found in 2021 by transit.
K2-138 f — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 13 days; about 380 °C, hotter than boiling water; found in 2017 by transit.

The NASA Exoplanet Archive's page

De dónde proceden estos datos

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.

Todos los catálogos que usa Ouranos se citan en la página de créditos.

Sus planetas

K2-138 c — 2.3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 4 days; about 740 °C, hotter than boiling water; found in 2017 by transit.

K2-138 d — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 5 days; about 620 °C, hotter than boiling water; found in 2017 by transit.

K2-138 b — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 2 days; about 880 °C, hotter than boiling water; found in 2017 by transit.

K2-138 e — 3.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 8 days; about 480 °C, hotter than boiling water; found in 2017 by transit.

K2-138 g — 3 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 42 days; about 170 °C, hotter than boiling water; found in 2021 by transit.

K2-138 f — 2.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 13 days; about 380 °C, hotter than boiling water; found in 2017 by transit.

De dónde proceden estos datos

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.