Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
HD 34445 f, HD 34445 b have an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2009, by radial velocity (NASA Exoplanet Archive).
Its planets
HD 34445 d — 6.1 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 120 days; about 200 °C, hotter than boiling water; found in 2017 by radial velocity.
HD 34445 c — 8.4 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 210 days; about 120 °C, hotter than boiling water; found in 2017 by radial velocity.
HD 34445 g — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 16 Earth years; about −140 °C, below freezing; found in 2017 by radial velocity.
HD 34445 e — 4.3 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 49 days; about 370 °C, hotter than boiling water; found in 2017 by radial velocity.
HD 34445 f — 6.9 times Earth's width (estimated from its mass, not measured), Neptune-sized; its year lasts 680 days; about −7 °C, below freezing; found in 2017 by radial velocity.
HD 34445 b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 3 Earth years; about −42 °C, below freezing; found in 2009 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.