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Free orbital period calculator for satellites and circular trajectories. Estimate orbit duration, orbital speed, and gravitational parameter from central mass and orbital radius.
Last updated: April 20, 2026
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Orbital period
1.540 h
Orbital speed
7672.5 m/s
Period in seconds
5544.9 s
mu = G x M
3.9859e+14 m^3/s^2
Interpretation
Estimated orbital period is 1.540 hours with orbital speed 7672.5 m/s.
Model note:
Assumes circular orbit and point-mass gravity. Real trajectories can vary with eccentricity and perturbations.
Formula
T = 2 pi sqrt(r^3 / mu)
Relation
v = sqrt(mu / r)
Output set
seconds, hours, m/s
Earth mass and 6771 km radius (approx low Earth orbit)
Orbital period
1.540 h
Orbital speed
7672.5 m/s
This calculator uses Newtonian gravity and circular orbit assumptions. It first computes mu = G M, then derives orbit period and speed from radius measured from the center of the central body.
mu = G x MT = 2 pi sqrt(r^3 / mu)v = sqrt(mu / r)Use radius from center (not altitude alone) for physically consistent results.
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