Kepler-128

Measured

Distance

about 1,293 light-years

Confirmed planets

2

How far, from the Sun

About 1,290 light-years. To cross it:

• Light1,290 years
• Voyager 1's speed23 million years
• Driving at 100 km/h14 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 2013, by transit (NASA Exoplanet Archive).

Its planets

• Kepler-128 b — 1.4 times Earth's width, about Earth-sized — probably rocky; its year lasts 15 days; about 700 °C, hotter than boiling water; found in 2013 by transit.
• Kepler-128 c — 1.5 times Earth's width, about Earth-sized — probably rocky; its year lasts 23 days; about 570 °C, hotter than boiling water; found in 2013 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.