Tamburo, PatrickMuirhead, Philip S.Agol, EricHart, MurdockThakar, Bhargavi2022-03-252022-03-252021-09-29P. Tamburo, P.S. Muirhead, E. Agol, M. Hart, B. Thakar. 2021. "Confirmation of a Dynamical Model for the TRAPPIST-1 Exoplanetary System." Research Notes of the AAS, Volume 5, Issue 9, pp. 219 - 219. https://doi.org/10.3847/2515-5172/ac2a4a2515-5172https://hdl.handle.net/2144/44086We present a new transit of TRAPPIST-1 d from 2021 August 25. The measured mid-point of this transit agrees with the prediction from a recently published dynamical model for the TRAPPIST-1 system and differs significantly from a naive prediction from a simple linear ephemeris. This difference underlines the importance for using dynamical models to predict future transit times in the TRAPPIST-1 system.p. 219en-USOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.http://creativecommons.org/licenses/by/4.0/Article10.3847/2515-5172/ac2a4a643858