2799402

Target RA (J2000): 279.358123779297 and deg Target Dec (J2000): 18.7299499511719 and deg Gaia GMag: 10.951 Programme ID: CH_PR149002 Programme Manager: EDWARDS PI of observing programme: Benz Title of programme: SoM - ArielExoClock Abstract: To uncover the demographics of exoplanet atmospheres Ariel will require a large diverse list of potential targets. Luckily ground-based and space-based surveys have detected hundreds of transiting planets around bright stars. However simply knowing of the planets existence is not enough and preliminary characterisation efforts must be undertaken to ensure the suitability of the target for study. A key piece of information is an accurate knowledge of the predicted transit time of a planet. In this programme CHEOPS observations will be used to support the Ariel mission by maintaining the ephemeris of critical targets. [truncated! Please see actual data for full text]