2084021

Target RA (J2000): 223.783447 and deg Target Dec (J2000): -41.12039 and deg Gaia GMag: 8 Programme ID: CH_PR140070 Programme Manager: SZABO PI of observing programme: Benz Title of programme: Axis 3 - Photometric transits of exocomets Abstract: We aim to observe the spectroscopically proven exocomet-hosting systems with CHEOPS. Emphasis will be on the two-band TESS+CHEOPS photometry and the synchronous spectroscopic observation to observe the same transit in spectroscopy and photometry for the first time. Photometric observations will give us an insight to the structure and the total scattering cross section of the comet in transit while spectroscopy shows us the total amount of refractory elements in the line of sight. Combining these two we will be able to observe the parameters of the dust such as the content of refractory elements in the dust and we can infer to the size distribution index of the dust grains. [truncated! Please see actual data for full text]