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High-precision transit observations provide excellent opportunities forcharacterizing the physical properties of exoplanetary systems. These physicalproperties supply many pieces of information for unvealing the internalstructure, external atmosphere, and dynamical history of the planets. Wepresent revised properties of transiting systems WASP-35 and HAT-P-30/WASP-51through analyzing newly available TESS photometry and ground-based observationsobtained at 1m telescope of Yunnan Observatories as well as from theliterature. The improved system parameters are consistent with the previousresults. Furthermore, we find that HAT-P-30b/WASP-51b's transits showsignificant timing variation which cannot be explained by decaying orbit due totidal dissipation and the R\o mer effect, while both apsidal precession and anadditional perturbing body could reproduce this signal through ourcomprehensive dynamical simulations. Because both of them are valuable targetswhich are suitable for transmission spectroscopy, we make some predictions foratmospheric properties of WASP-35b and HAT-P-30b/WASP-51b based on newlyderived system parameters.

WASP-35 and HAT-P-30/WASP-51: re-analysis using TESS and ground-based transit photometry