TOI-1136: A Star With Six Known Planets

TOI-1136 is a star 276 light-years from Earth. It has six known planets, all discovered by the transit method in 2022. A transit occurs when a planet passes in front of its star from our viewpoint, causing a small dip in observed brightness; repeated dips help establish orbital periods.

The host star has an age of 0.7 billion years. Its mass is 1.04 solar masses, larger than the Sun's, and its radius is 0.957 solar radii, smaller than the Sun's. Its temperature is 5810 K. Solar masses and radii compare stellar mass and radius with the Sun.

The six planets are TOI-1136 b, TOI-1136 c, TOI-1136 d, TOI-1136 e, TOI-1136 f, and TOI-1136 g. Each has a reported mass larger than Earth's. TOI-1136 b has a mass of 3.5 Earth masses and an orbital period of 4.17 days. TOI-1136 c has a mass of 6.32 Earth masses and an orbital period of 6.26 days. TOI-1136 d has a mass of 8.35 Earth masses and an orbital period of 12.5 days. TOI-1136 e has a mass of 6.07 Earth masses and an orbital period of 18.8 days. TOI-1136 f has a mass of 9.7 Earth masses and an orbital period of 26.3 days. TOI-1136 g has a mass of 5.6 Earth masses and an orbital period of 39.5 days. Earth masses compare mass.

Among the listed planets, TOI-1136 b has the shortest year, at 4.17 days, and the smallest reported mass, at 3.5 Earth masses. TOI-1136 c has the second-shortest year, at 6.26 days. TOI-1136 g has the longest year, at 39.5 days, and the second-smallest reported mass, at 5.6 Earth masses. TOI-1136 f has the second-longest year, at 26.3 days, and the largest reported mass, at 9.7 Earth masses. TOI-1136 d has the second-largest reported mass, at 8.35 Earth masses.