TOI-6008 b: A Close-In Earth-Sized World

TOI-6008 is an M5.0 star located 75.3 light-years away. As an M-type dwarf, it is a small, cool red star, and its reported mass estimate is 0.23 solar masses, smaller than the Sun's. Its reported radius estimate is 0.242 solar radii, also smaller than the Sun's, and its reported temperature is 3080 K, cooler than the Sun's. The star's age is given as a reported lower limit of 3 billion years. One planet is known to orbit this host.

That planet is TOI-6008 b, an Earth-like planet discovered in 2024 by the transit method. Its radius is 1.03 Earth radii, placing it within the Earth-like size class, which spans planets up to 1.5 times Earth's radius. Its mass is a reported upper limit of 4 Earth masses, and its orbital period is just 0.857 days. The transit method detects such worlds when they pass in front of their star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods.