rev/d\text{rev/d}

revolution per day

Angular speedexact by definition

The revolution per day is 2π/86400 rad/s, about 7.272 × 10⁻⁵ rad/s. It is the natural unit for orbital and planetary rotation: a satellite in low Earth orbit completes roughly 15 revolutions per day, and that figure is the mean motion field in a two-line element set.

Watch out: Mean motion in a TLE is revolutions per solar day of 86,400 s, which is what this unit uses. Earth's own rotation, by contrast, is one revolution per sidereal day of 86,164 s, so a geostationary satellite's mean motion is 1.0027 rev/day rather than exactly 1.

1 rev/d\text{rev/d} 0.000072722052 rad/s\text{rad/s}

One revolution per day in every angular speed unit

15degree per hour (°/h)
1revolution per day (rev/d)this unit
0.25degree per minute (°/min)
0.0727221milliradian per second (mrad/s)
0.0416667revolution per hour (rev/h)
0.00436332radian per minute (rad/min)
0.00416667degree per second (°/s)
0.000694444revolution per minute (rpm)
0.0000727221radian per second (rad/s)
0.0000115741revolution per second (rev/s)
6.94444e-07thousand revolutions per minute (krpm)