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

HD 81817

HD 81817, una estrella K3 III, tiene 2 planetas confirmados.

Medido

Acerca de 878 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 2020, por velocidad radial (NASA Exoplanet Archive).

HD 81817 b — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 3 Earth years; about 740 °C, hotter than boiling water; found in 2020 by radial velocity.
HD 81817 c — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 620 days; about 930 °C, hotter than boiling water; found in 2022 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

HD 81817, una estrella K3 III, tiene 2 planetas confirmados.

Acerca de 878 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 2020, por velocidad radial (NASA Exoplanet Archive).

HD 81817 b — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 3 Earth years; about 740 °C, hotter than boiling water; found in 2020 by radial velocity.
HD 81817 c — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 620 days; about 930 °C, hotter than boiling water; found in 2022 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.