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Target RA (J2000): 37.155109 and deg Target Dec (J2000): -7.06066 and deg Gaia GMag: 10.09 Programme ID: CH_PR230016 PI of observing programme: Teinturier Title of programme: CHEOPS Phase Curves to Characterize the Clouds Composition of Hot Jupiters Abstract: Observing and modeling efforts have recently been made to begin the atmospheric characterization of It is thought that clouds are ubiquitous in the atmosphere of Hot Jupiter. However distinguishing between the different kinds of condensates is hard as degeneracies emerge when analyzing photometric and spectral data. High precision optical phase curves can help disentangle these degeneracies as the peak offset of the optical phase curve is sensitive to the cloud's composition. We aim to observe two phase curves of the Hot Jupiter HIP 65A b and three phase curves of the Hot Jupiter WASP-77A b. HIP 65A b has anxa0equilibrium temperature of 1410 K an orbital period of 0.98 days and a poorly constrained radius between 2.64 and 1.54 RJ.xa0 WASP-77A b has an equilibrium temperature of 1715 K an orbital period of 1.35 days and a radius of 1.230 RJ.xa0 These observations will allow us to refine the constraints on the planetary radius (in particular for HIP 65A b) to constrain the geometric albedo and potentially to discriminate between different forming clouds. They will also be useful for the preparation and interpretation of future observations by JWST and ARIEL as well as characterizations by high spectral resolution observations by SPIRou or CRIRES. [truncated! Please see actual data for full text]