The European Space Agency at least gets the Equatorial speed of the Equator right at 1670 Km/hr as opposed to the fictional 1674 km/hr based on the false 'sidereal' nonsense.

https://www.esa.int/esaKIDSen/SEM697...niverse_0.html

https://en.wikipedia.org/wiki/Earth

The difference between the first reference site (ESA) and the second (Wikipedia) is that the former is based on a line of technical and historical reasoning of the 24 hour and the Lat/Long systems as a subset of the calendar framework and its references with RA/Dec which is basically piggybacking on the 24 hour system.

Of course filling in the technical gaps between timekeeping, longitude and the calendar format was done here in this newsgroup over the last few decades and especially the neat trick of converting the average 24 hour day to constant 360° rotation or at a rate of 15° per hour and ultimately 1670 Km per hour.

Nice to recover the facts of a round and rotating Earth in spite of those who are unable to model rotation correctly using clocks.