HD 164604, a K3.5 V star, has 2 confirmed planets.
Measured
Distance
about 128 light-years
Star's spectral type
K3.5 V
Confirmed planets
2
How far, from the Sun
About 128 light-years. To cross it:
Light128 years
Voyager 1's speed2.28 million years
Driving at 100 km/h1.39 billion years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
How it was found
First planet found in 2009, by radial velocity (NASA Exoplanet Archive).
Its planets
HD 164604 b — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts 650 days; about −100 °C, below freezing; found in 2009 by radial velocity.
HD 164604 c — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 15 Earth years; about −190 °C, below freezing; found in 2026 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.