LTT 3780, an M3.5 V star, has 2 confirmed planets.
Measured
Distance
about 71.7 light-years
Star's spectral type
M3.5 V
Confirmed planets
2
How far, from the Sun
About 71.7 light-years. To cross it:
Light71.7 years
Voyager 1's speed1.27 million years
Driving at 100 km/h774 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 2020, by transit (NASA Exoplanet Archive).
Its planets
LTT 3780 b — 1.3 times Earth's width, about Earth-sized — probably rocky; its year lasts 18 hours; about 630 °C, hotter than boiling water; found in 2020 by transit.
LTT 3780 c — 2.4 times Earth's width, a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 12 days; about 86 °C, between freezing and boiling; found in 2020 by transit.
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.