Comparative study of nearly‐grazing and fully‐grazing exoplanet system parameters derived with <scp>TESS</scp> and ground‐based instruments

Grazing transiting systems are rare and difficult to parameterize due their partial transit geometry. We investigated a sample of 43 nearly-grazing fully-grazing exoplanetary systems, using datasets provided by the Transiting Exoplanet Satellite Survey (TESS), aiming first refine major system parameters. focus on two parameters, impact parameter b $$ planetary radius R p {R}_{\mathrm{p}} , through comparison TESS light curves with ground-based curves. investigate if there is potential systematic trend between space-based investigations that would possibly lead redefinition grazing nature those systems. Our results have shown value confirmed for most within 2 σ 2\sigma refined significantly Kilodegree Extremely Little Telescope (KELT)-8 b, while uncertainty was improved five > 0.8 b>0.8 . The measurements four were successfully refined, majority exoplanets 0.9 b>0.9 Furthermore, more pronounced where mean overestimation derived 0.15 J 0.15{R}_{\mathrm{J}} concluded eventually from our only truly grazing, considered as not.