I'm writing an article on the various speeds we experience as we travel through space, and I'm hoping the fine members of this board can check my math.
I've already addressed that speed and velocity are tricky in a relative universe, so for simplicity I'm making my measurements compared to either background stars or the Cosmic Microwave Background. My numbers are:
Rotation of the Earth: 0465 kilometers per second (at equator)
Orbit of Earth around Sun: 30 kps
Sun's motion (relative to nearby stars): 20 kps
Orbit of Sun around galactic center: 220 kps
Galaxy orbit around common center with other galaxies (with respect to CMB): 550 kps
Total: ~820 kilometers per second.