2046211

Target RA (J2000): 189.839218 and deg Target Dec (J2000): 20.02734 and deg Gaia GMag: 8.172 Programme ID: CH_PR120053 Programme Manager: LELEU PI of observing programme: Benz Title of programme: MR.IMPROVE - System Architecture Abstract: The resonant/near-resonant state of multi-planetary systems contains clues to their formation and subsequent evolution through disc migration and tidal dissipation. Physical quantities such as densities eccentricities distance to 2-body or 3-body resonances and the amplitude of libration of resonant angles subtly encode the systems' history. These quantities can be estimated by observing transit timing variations in the system. The program aims to use CHEOPS high-precision photometry and versatility coupled with orbital dynamics modelling to : 1- constrain the resonant state of systems 2- Look for (density-period) correlations inside known multi-planetary systems and (help to) determine their mass-radius-period relationship and 3 - Look for additional planets in these compact multi-planetary systems to improve our knowledge of their architecture. [truncated! Please see actual data for full text]