The Hubble Space Telescope measured the mass and diameter of the exoplanet LTT 1445Ac during the transit of the parent star’s disk.
The study was published in The Astronomical Journal.
Hubble observations have shown that the diameter of LTT 1445Ac is 1.07 times larger than the diameter of the Earth. The planet’s mass is 1.3 times that of the Earth.
A year on LTT 1445Ac lasts only 3.1 days, and due to its proximity to the star, the surface temperature reaches 260 °C, making the planet uninhabitable.
The exoplanet LTT 1445Ac was discovered by NASA’s TESS telescope in 2022. However, its resolution was not enough for accurate measurements.
LTT 1445Ac orbits with two larger planets around a common red dwarf star in a triple system 22 light-years from Earth in the constellation Eridanus.
