TIC 139270665 and Its Two Known Planets

TIC 139270665 is a G-type star 619 light-years away with two known planets in its system. The star is a Sun-like dwarf with a spectral type of G2. It is 3.4 billion years old, has 1.03 solar masses, a radius of 1.02 solar radii, and a temperature of 5840 K.

TIC 139270665 b was discovered by the transit method in 2024. It is classified as Jupiter-like because its radius of 7.23 Earth radii exceeds four times Earth's radius. Its mass is 147 Earth masses, larger than Earth's, and its mean density is 2.15 g/cm³, or 0.389 times Earth's. Among the listed planets, it has the shortest year, 23.6 days.

TIC 139270665 c was discovered in 2024 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. Its minimum mass is 1550 Earth masses, a lower bound on its true mass that is greater than Earth's and roughly 4.89 times Jupiter's mass. It takes 1010 days to complete an orbit, the longest year of the two planets.