Voyager 1 alla velocità con cui si è allontanata nell'anno fino al 2026-10-25 (JPL Horizons). In auto: senza sosta, senza mai fare rifornimento.
Come è stato scoperto
Primo pianeta scoperto nel 2022 con il transito (NASA Exoplanet Archive).
I suoi pianeti
HD 28109 c — 4.1 times Earth's width, Neptune-sized; its year lasts 56 days; about 370 °C, hotter than boiling water; found in 2022 by transit.
HD 28109 d — 3.1 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 84 days; about 290 °C, hotter than boiling water; found in 2022 by transit.
HD 28109 b — 2.7 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 23 days; about 590 °C, hotter than boiling water; found in 2022 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.