A transit timing variation observed for the long-period extremely low density exoplanet HIP 41378f

Edward M. Bryant, Daniel Bayliss, Alexandre Santerne +47

HIP 41378 f is a temperate $9.2\pm 0.1R_{\oplus }$ planet with period of 542.08 days and an extremely low density of $0.09\pm 0.02$ g cm${}^{-3}$. It transits the bright star HIP 41378…