The Hubble Law using galaxies with
visible Cepheid variables.
from a recent paper by Wendy Freedman and coworkers,
using the Hubble Space Telescope
H is 75 km/s/Mpc
If galaxy is 10 Mpc away
it is moving at 750 km/s
If galaxy is moving at
1500 km/s
it is 20 Mpc away