HD 99109, a G8/K0 IV star, has one confirmed planet.
Measured
Distance
about 179 light-years
Star's spectral type
G8/K0 IV
Confirmed planets
1
How far, from the Sun
About 179 light-years. To cross it:
Light179 years
Voyager 1's speed3.18 million years
Driving at 100 km/h1.93 billion years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
HD 99109 b has an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2005, by radial velocity (NASA Exoplanet Archive).
Its planets
HD 99109 b — 14 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 440 days; about −34 °C, below freezing; found in 2005 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.