TY - GEN TI - An Alternative Explanation of the Rapid Orbital Expansion of Titan AU - Křížek, Michal AU - Gueorguiev, Vesselin G. AU - Maeder, André AB - Recently it was found from Cassini data that the mean recession speed of Titan from Saturn is v = 11.3 ± 2.0 cm/yr which corresponds to a tidal quality factor of Saturn Q = 100 while the standard estimate yields Q ≥ 6 · 104 . It was assumed that such a large speed v is due to a resonance locking mechanism of five inner mid-sized moons of Saturn. In this paper, we show that an essential part of v may come from a local Hubble expansion. Namely, we show that the Hubble-Lemaître constant H0 recalculated to the Saturn-Titan distance D is 8.15 cm/(yr D). Our hypothesis is based on many other observations showing a slight expansion of the Solar system and also of our Galaxy at a rate comparable with H0. We demonstrate that the large disproportion in estimating the Q factor can be just caused by the local expansion effect. DA - 2021/09/13/ PY - 2021 DP - www.preprints.org LA - en PB - Preprints.org UR - https://www.preprints.org/manuscript/202109.0200/v1 Y2 - 2021/10/05/22:27:37 ER -