TIC 279401253: A Distant Star With Two Known Planets

TIC 279401253 is a star 931 light-years away with two known planets. The star is 1.2 billion years old, has a mass of 1.13 solar masses, a radius of 1.06 solar radii, and a temperature of 5950 K. Its mass, radius, and temperature are each larger or hotter than the Sun's.

Both planets were discovered by transit in 2023. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness.

TIC 279401253 b is a Jupiter-like planet, a size class for planets exceeding 4 times Earth's radius. It has a mass of 1950 Earth masses, a radius of 11.2 Earth radii, and an orbital period of 76.8 days. Its radius and mass are larger than Earth's, its mass is roughly 6.14 times Jupiter's mass, and its mean density is 7.64 g/cm³, 1.39 times Earth's. Among the listed planets, it has the shortest year by reported estimates.

TIC 279401253 c has a minimum mass of 2550 Earth masses and an orbital period of 155 days. A minimum mass is a lower bound on a planet's true mass, and this value is larger than Earth's and roughly 8.02 times Jupiter's mass. Among the listed planets, it has the longest year by reported estimates.