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

Estrella con 2 planetas conocidos

K2-18

K2-18, una estrella M2.5 V, tiene 2 planetas confirmados.

Medido

Acerca de 124 años luz. Para cruzarlo:

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.

Primer planeta descubierto en 2015, por tránsito y velocidad radial (NASA Exoplanet Archive).

K2-18 b — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 33 days; about 11 °C, between freezing and boiling; found in 2015 by transit.
K2-18 c — 2.7 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 9 days; about 90 °C, between freezing and boiling; found in 2017 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.

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

Estrella con 2 planetas conocidos

K2-18, una estrella M2.5 V, tiene 2 planetas confirmados.

Acerca de 124 años luz. Para cruzarlo:

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.

Primer planeta descubierto en 2015, por tránsito y velocidad radial (NASA Exoplanet Archive).

K2-18 b — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 33 days; about 11 °C, between freezing and boiling; found in 2015 by transit.
K2-18 c — 2.7 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 9 days; about 90 °C, between freezing and boiling; found in 2017 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.