HD 73344: A Star With Three Known Planets

HD 73344 is a single star located 115 light-years away, and three planets have been reported orbiting it. The host is an F6 V star, a main-sequence dwarf somewhat hotter and more massive than the Sun. Its reported mass is 1.2 solar masses and its reported radius is 1.22 solar radii, both larger than the Sun's corresponding values. Its temperature of 6250 K is also hotter than the Sun's, and its age is 1.15 billion years.

HD 73344 b was found by the transit method and reported in 2024. A transit occurs when a planet crosses in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods. HD 73344 b has a reported radius of 2.88 Earth radii, larger than Earth's, and its Neptune-like classification places it in a size class reaching up to four times Earth's radius. Its mass is given as a reported upper limit of 10.48 Earth masses, and its orbital period is 15.6 days, the shortest among the listed planets.

HD 73344 c and HD 73344 d were both discovered in 2025 using the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. HD 73344 c has a minimum mass of 119 Earth masses, larger than Earth's, and an orbital period of 65.9 days, the second-shortest among the listed planets. HD 73344 d has a reported mass of 810 Earth masses, larger than Earth's and roughly 2.55 times Jupiter's mass, with an orbital period of 5820 days, the longest among the listed planets.