Traduzido por IA (Opus 5.5) a partir do cartão em inglês. Números, nomes e fontes não foram alterados.

Estrela com 3 planetas conhecidos

K2-157

K2-157, uma estrela G9 V, tem 3 planetas confirmados.

Medido

Sobre 973 anos-luz. Para atravessá-lo:

Voyager 1 à velocidade com que se afastou ao longo do ano até 2026-10-25 (JPL Horizons). Dirigindo: sem parar, sem nunca reabastecer.

Primeiro planeta descoberto em 2018 por velocidade radial e trânsito (NASA Exoplanet Archive).

K2-157 c — 6.1 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 26 days; about 310 °C, hotter than boiling water; found in 2025 by radial velocity.
K2-157 d — 5.2 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 67 days; about 160 °C, hotter than boiling water; found in 2025 by radial velocity.
K2-157 b — 0.9 times Earth's width, about Earth-sized — probably rocky; its year lasts 9 hours; about 2,200 °C, hot enough to melt rock; found in 2018 by transit.

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.

Traduzido por IA (Opus 5.5) a partir do cartão em inglês. Números, nomes e fontes não foram alterados.

Estrela com 3 planetas conhecidos

K2-157, uma estrela G9 V, tem 3 planetas confirmados.

Sobre 973 anos-luz. Para atravessá-lo:

Voyager 1 à velocidade com que se afastou ao longo do ano até 2026-10-25 (JPL Horizons). Dirigindo: sem parar, sem nunca reabastecer.

Primeiro planeta descoberto em 2018 por velocidade radial e trânsito (NASA Exoplanet Archive).

K2-157 c — 6.1 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 26 days; about 310 °C, hotter than boiling water; found in 2025 by radial velocity.
K2-157 d — 5.2 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 67 days; about 160 °C, hotter than boiling water; found in 2025 by radial velocity.
K2-157 b — 0.9 times Earth's width, about Earth-sized — probably rocky; its year lasts 9 hours; about 2,200 °C, hot enough to melt rock; found in 2018 by transit.

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.