Kepler-247

Ouranosで開く

K型星ケプラー-247には確認済みの惑星が4個あります。

測定値

距離: 約2,165光年
恒星のスペクトル型: K
確認済みの惑星: 4

太陽からの距離

概要 2,160光年. 横断するには:

光2,160年
ボイジャー1号の速さ38.5百万年
時速100 kmで走行23.40億年

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。

発見方法

2014年にトランジット法とトランジット時間変化法で発見された最初の惑星（NASA太陽系外惑星アーカイブ）。

惑星

Kepler-247 d — 4.5 times Earth's width, Neptune-sized; its year lasts 20 days; about 260 °C, hotter than boiling water; found in 2014 by transit.
Kepler-247 c — 4.1 times Earth's width, Neptune-sized; its year lasts 9 days; about 410 °C, hotter than boiling water; found in 2014 by transit.
KOI-884 e — 9.5 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 31 days; found in 2014 by transit timing variations.
Kepler-247 b — 1.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 3 days; about 700 °C, hotter than boiling water; found in 2014 by transit.

The NASA Exoplanet Archive's page

出典

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.

Ouranosが描画するすべてのカタログは、クレジットページに記載されています。

惑星

Kepler-247 d — 4.5 times Earth's width, Neptune-sized; its year lasts 20 days; about 260 °C, hotter than boiling water; found in 2014 by transit.

Kepler-247 c — 4.1 times Earth's width, Neptune-sized; its year lasts 9 days; about 410 °C, hotter than boiling water; found in 2014 by transit.

KOI-884 e — 9.5 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 31 days; found in 2014 by transit timing variations.

Kepler-247 b — 1.6 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 3 days; about 700 °C, hotter than boiling water; found in 2014 by transit.

出典

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.