BD-210397

K7 V型星のBD-210397には、確認済みの惑星が2つあります。

測定値

概要 77.4光年. 横断するには:

2026-10-25までの1年間に外向きに進んだ速さでのボイジャー1号（JPL Horizons）。走行条件：休みなし、給油なし。

BD-210397 c — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 17 Earth years; about −200 °C, below freezing; found in 2023 by radial velocity.
BD-210397 b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 5 Earth years; about −170 °C, below freezing; found in 2023 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.

英語版カードからAI（Opus 5.5）により翻訳。数値、名称、出典は変更していません。

2個の惑星が知られている恒星

K7 V型星のBD-210397には、確認済みの惑星が2つあります。

概要 77.4光年. 横断するには:

2026-10-25までの1年間に外向きに進んだ速さでのボイジャー1号（JPL Horizons）。走行条件：休みなし、給油なし。

BD-210397 c — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 17 Earth years; about −200 °C, below freezing; found in 2023 by radial velocity.
BD-210397 b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 5 Earth years; about −170 °C, below freezing; found in 2023 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.