A comoving observer is the only observer that will perceive the universe, including the cosmic microwave background radiation, to be isotropic. (Wikipedia)
According to this definition, is Earth considered as a comoving reference frame, or are we supposed to have a "peculiar velocity"?
What is the current precision for measuring if a frame is comoving or not, and for measuring its peculiar velocity? Or: From which speed (with respect to Earth) a frame would be considered as peculiar?