HIP 9618

Measured

Distance

about 220 light-years

Confirmed planets

2

How far, from the Sun

About 220 light-years. To cross it:

• Light220 years
• Voyager 1's speed3.91 million years
• Driving at 100 km/h2.38 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 2023, by transit (NASA Exoplanet Archive).

Its planets

• HIP 9618 b — 3.8 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 21 days; about 370 °C, hotter than boiling water; found in 2023 by transit.
• HIP 9618 c — 3.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 53 days; about 200 °C, hotter than boiling water; found in 2023 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.