HD 160691, a G3 IV-V star, has 4 confirmed planets.
Measured
Distance
about 50.9 light-years
Star's spectral type
G3 IV-V
Confirmed planets
4
How far, from the Sun
About 50.9 light-years. To cross it:
Light50.9 years
Voyager 1's speed904,000 years
Driving at 100 km/h549 million years
Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.
Facts
HD 160691 b has an equilibrium temperature between −50 and +50 °C.
How it was found
First planet found in 2000, by radial velocity (NASA Exoplanet Archive).
Its planets
HD 160691 b — about 1,400 times Earth's mass; its year lasts 650 days; about −11 °C, below freezing; found in 2000 by radial velocity.
HD 160691 d — 3.2 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 10 days; about 630 °C, hotter than boiling water; found in 2004 by radial velocity.
HD 160691 e — about 2,200 times Earth's mass; its year lasts 310 days; about 55 °C, between freezing and boiling; found in 2006 by radial velocity.
HD 160691 c — about 1,400 times Earth's mass; its year lasts about 11 Earth years; about −120 °C, below freezing; found in 2004 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.