Astronomical unit per year

Astronomical unit per year (AU/yr) is a unit of used in  to denote the  of s, s, and close  around the. This unit shall be useful especially for planets because units in this derivative are based on our in unity. Another reason is that this unit is calculated most simply, easier than calculating in km/s, mi/s, kph or mph.

1 AU/yr is the orbital velocity of Earth divided by 2π, 4.756 km/s or 2.955 mi/s (17120 kph or 10640 mph), about the velocity of. To calculate the orbital velocity, simply divide in s by  in s and then multiply the quotient 2π.