About this world
TIC 290487717 b is a Neptune-like planet orbiting TIC 290487717, a yellow, Sun-like star 1.29 thousand light-years from Earth. It is about 0.59 times the size of Jupiter. It completes an orbit every 3.4 days at 0.043 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 1,208 K (935 °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 2026 by transit with Transiting Exoplanet Survey Satellite (TESS). A planet crosses its star and dims it by a tiny, periodic fraction.