What unit of measure does the Hubble constant use?
As of now, based on advanced technological methods in
measurements, the Hubble constant in the formula,
Recession speed =
This means that a galaxy is relatively receding at a rate 68 km/sec
per the spacing of 1 parsec.
For N parsecs the recession speed = N km/s.
Here, 1 megaparsec = 1 million parsec and 1 parsec = 206265 AU =
30857 billion km.
So, 1 megaparsec = 30857 million billion km = 3 X