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 | 0.000072722052 rad/s |
Solvers that use angular speed