About this world
TOI-1386 b is a Neptune-like planet orbiting TOI-1386, a yellow, Sun-like star (type G5V) 479 light-years from Earth. It is about 0.55 times the size of Jupiter and holds 0.14 Jupiter masses. It completes an orbit every 25.8 days at 0.17 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 615 K (342 °C): far too hot for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2024 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction. TOI-1386 has 2 known planets; the others are TOI-1386 c.