A near neighbor with two temperate Earth-mass worlds

Teegarden's Star

Two roughly Earth-mass planets in a habitable zone around one of the nearest, quietest red dwarfs, plus an outer candidate. Hover for a quick look, or select a planet for its field notes.

Teegarden's Star A small, extremely quiet red dwarf only 12.5 light-years away. Type M7.0V red dwarf Distance 12.5 light-years Mass About 0.09 Suns Temperature About 2,900 K Teegarden's Star b Confirmed A roughly Earth-mass world in the inner part of the habitable zone. Solar Distance 0.0252 AU · 3.77 million km Size and Gravity Minimum mass 1.05 Earths; radius unknown Atmosphere and Weather Unknown; no atmosphere detected Moons and Satellites None known Day and Year 4.91-day orbit; rotation unknown Surface Temperature Estimated around 301 K without an atmosphere Habitability Verdict Inside the habitable zone; surface conditions unknown Teegarden's Star c Confirmed A roughly Earth-mass world deeper in the habitable zone. Solar Distance 0.0443 AU · 6.63 million km Size and Gravity Minimum mass 1.11 Earths; radius unknown Atmosphere and Weather Unknown; no atmosphere detected Moons and Satellites None known Day and Year 11.41-day orbit; rotation unknown Surface Temperature Estimated around 226 K without an atmosphere Habitability Verdict Inside the habitable zone; surface conditions unknown Teegarden's Star d Candidate A proposed cold outer world, reported in 2024 and not yet independently confirmed. Solar Distance 0.0791 AU · 11.8 million km Size and Gravity Proposed minimum mass 0.82 Earths; radius unknown Atmosphere and Weather Unknown; no atmosphere detected Moons and Satellites None known Day and Year Proposed 26.1-day orbit; rotation unknown Surface Temperature Estimated around 159 K without an atmosphere Habitability Verdict Unconfirmed candidate, too cold for surface liquid water

A quiet red dwarf · two temperate Earth-mass planets · one outer candidate

Orbit spacing and animation are illustrative, not to scale. Orbital periods are shown in the planet notes.

Planet data: NASA Exoplanet Archive · Zechmeister et al. 2019 · Dreizler et al. 2024