3.5+ Years of Characterising Exoplanetary Systems with CHEOPS

Characterizing Exoplanets Satellite (CHEOPS) is the first ESA space mission dedicated to the study of known exoplanets. The satellite, carrying a 30cm photometric telescope, carried out its 3.5-year nominal mission between December 2019 and September 2023 is currently in it’s first extended mission. CHEOPS is performing ultra-high precision photometry of exoplanetary systems with a sensitivity allowing to characterise small planets transiting Solar-type stars. CHEOPS is improving density measurements of low-mass planets, detecting and confirming small planets orbiting bright host stars and resolving the architectures of key exoplanet systems, including PLATO-like systems with long-period small planets. CHEOPS also probes planetary atmospheres through measurements of secondary eclipses and phase-curve observations. I will report on highlights of over 4 years worth of CHEOPS science and discuss how the mission is orienting itself in its first extension lasting until December 2026.