Star with a known planet
gam Cep
gam Cep, a K1 III-IV star, has one confirmed planet.
Measured
- Distance
- about 46 light-years
- Star's spectral type
- K1 III-IV
- Confirmed planets
- 1
How far, from the Sun
About 46 light-years. To cross it:
- Light46 years
- Voyager 1's speed817,000 years
- Driving at 100 km/h496 million 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 2003, by radial velocity (NASA Exoplanet Archive).
Its planets
- gam Cep b — 13 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 2 Earth years; about 83 °C, between freezing and boiling; found in 2003 by radial velocity.
The NASA Exoplanet Archive's page
Where this comes from
- 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.
Every catalogue Ouranos draws is credited on the credits page.