HAT-P-2

Measured

Distance

about 417 light-years

Star's spectral type

F8

Confirmed planets

2

How far, from the Sun

About 417 light-years. To cross it:

• Light417 years
• Voyager 1's speed7.4 million years
• Driving at 100 km/h4.5 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 2007, by radial velocity and transit (NASA Exoplanet Archive).

Its planets

• HAT-P-2 c — 12 times Earth's width (estimated from its mass, not measured), a giant, Jupiter-sized or more; its year lasts about 23 Earth years; found in 2023 by radial velocity.
• HAT-P-2 b — 11 times Earth's width, a giant, Jupiter-sized or more; its year lasts 6 days; about 1,300 °C, hot enough to melt rock; found in 2007 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.