فوياجر 1 بالسرعة التي ابتعد بها خلال السنة حتى 2026-10-25 (JPL Horizons). القيادة: دون توقف، ودون التزود بالوقود أبدًا.
حقائق
تتراوح درجة حرارة التوازن لكبلر-298 d بين −50 و+50 °س.
كيف اكتُشف
اكتُشف أول كوكب عام 2014 بطريقة العبور (أرشيف ناسا للكواكب الخارجية).
كواكبه
Kepler-298 b — 2 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 270 °C, hotter than boiling water; found in 2014 by transit.
Kepler-298 d — 2.5 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 77 days; about 4 °C, between freezing and boiling; found in 2014 by transit.
Kepler-298 c — 1.9 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 23 days; about 140 °C, hotter than boiling water; found in 2014 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.