Super-Earth and Sub-Neptune Found Orbiting TOI-1453 in Binary System

Astronomers have discovered two exoplanets, a super-Earth named TOI-1453 b and a sub-Neptune named TOI-1453 c, orbiting the star TOI-1453, which is about 250 light-years away in the Draco constellation. The host star, TOI-1453, is part of a binary star system and is slightly cooler and smaller than our Sun. TOI-1453 b, a super-Earth slightly larger than our own planet, completes an orbit around its star in just over four days. This extremely close proximity suggests that it has a very high surface temperature. TOI-1453 c, a sub-Neptune nearly twice the size of Earth with a low mass of about 2.9 Earth masses, presents some interesting questions. Its low density suggests that it may have a hydrogen-rich atmosphere or a water-dominated interior. These planets were detected using data from NASA's Transiting Exoplanet Survey Satellite (TESS) and the High Accuracy Radial Velocity Planet Searcher for the Northern hemisphere (HARPS-N) spectrograph.