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

Estrela com 4 planetas conhecidos

Kepler-138

Abrir no Ouranos

Kepler-138, uma estrela M1 V, tem 4 planetas confirmados.

Medido

Distância: cerca de 218 anos-luz
Tipo espectral da estrela: M1 V
Planetas confirmados: 4

Distância do Sol

Sobre 218 anos-luz. Para atravessá-lo:

Luz218 anos
Velocidade da Voyager 13.88 milhões de anos
Dirigindo a 100 km/h2.35 bilhões de anos

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

Fatos

Kepler-138 e tem uma temperatura de equilíbrio entre −50 e +50 °C.

Como foi descoberto

Primeiro planeta descoberto em 2014 por trânsito e variações no tempo de trânsito (NASA Exoplanet Archive).

Seus planetas

Kepler-138 d — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 23 days; about 72 °C, between freezing and boiling; found in 2014 by transit.
Kepler-138 c — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 14 days; about 140 °C, hotter than boiling water; found in 2014 by transit.
Kepler-138 b — 0.6 times Earth's width, smaller than the Earth; its year lasts 10 days; about 180 °C, hotter than boiling water; found in 2014 by transit.
Kepler-138 e — 0.8 times Earth's width (estimated from its mass, not measured), about Earth-sized — probably rocky; its year lasts 38 days; about 19 °C, between freezing and boiling; found in 2022 by transit timing variations.

The NASA Exoplanet Archive's page

De onde vem isto

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.

Todo catálogo que o Ouranos utiliza é creditado na página de créditos.

Seus planetas

Kepler-138 d — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 23 days; about 72 °C, between freezing and boiling; found in 2014 by transit.

Kepler-138 c — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 14 days; about 140 °C, hotter than boiling water; found in 2014 by transit.

Kepler-138 b — 0.6 times Earth's width, smaller than the Earth; its year lasts 10 days; about 180 °C, hotter than boiling water; found in 2014 by transit.

Kepler-138 e — 0.8 times Earth's width (estimated from its mass, not measured), about Earth-sized — probably rocky; its year lasts 38 days; about 19 °C, between freezing and boiling; found in 2022 by transit timing variations.

De onde vem isto

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.