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

Estrela com 2 planetas conhecidos

TOI-421

TOI-421, uma estrela G9 V, tem 2 planetas confirmados.

Medido

Sobre 244 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.

TOI-421 b — 2.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 5 days; about 650 °C, hotter than boiling water; found in 2020 by transit.
TOI-421 c — 5.1 times Earth's width, Neptune-sized; its year lasts 16 days; about 360 °C, hotter than boiling water; found in 2020 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 2 planetas conhecidos

TOI-421, uma estrela G9 V, tem 2 planetas confirmados.

Sobre 244 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.

TOI-421 b — 2.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 5 days; about 650 °C, hotter than boiling water; found in 2020 by transit.
TOI-421 c — 5.1 times Earth's width, Neptune-sized; its year lasts 16 days; about 360 °C, hotter than boiling water; found in 2020 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.