These effects are technically present but negligible for all practical purposes (well, unless you're building the next Gravity Probe B). The geodetic precession

These effects are technically present but negligible for all practical purposes (well, unless you're building the next Gravity Probe B). The geodetic precession for a satellite in polar LEO is roughly 1 deg per 500 years [1]; the other types are orders of magnitude smaller. You've made a good point, however, that two of these types of precession are evidence that the Earth spins (whether you could convince a flat-Earther of Thomas precession is a separate matter). But let me offer a gentle correction: Thomas and Lense-Thirring precessions are caused by the rotation of the Earth, whereas the geodetic precession is merely caused by the presence of a central mass. --- [1] Gravity Probe B final report: https://arxiv.org/abs/1105.3456 https://arxiv.org/abs/1105.3456