K2-223

Measured

Distance

about 648 light-years

Star's spectral type

G1 V

Confirmed planets

2

How far, from the Sun

About 648 light-years. To cross it:

• Light648 years
• Voyager 1's speed11.5 million years
• Driving at 100 km/h6.99 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 2018, by transit (NASA Exoplanet Archive).

Its planets

• K2-223 c — 1.4 times Earth's width, about Earth-sized — probably rocky; its year lasts 5 days; about 920 °C, hotter than boiling water; found in 2018 by transit.
• K2-223 b — 0.8 times Earth's width, smaller than the Earth; its year lasts 12 hours; about 2,200 °C, hot enough to melt rock; found in 2018 by transit.

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.