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sci.satellite-orbital-altitude Calculator
Calculates satellite orbital altitude, period, and velocity from the central body mass and desired orbital parameters. ISS orbits at 408 km (period 92.5 min, speed 7.66 km/s) — geostationary orbit at 35,786 km has exactly 24 h period and zero apparent motion from the ground.
Inputs
Orbital Period Min
Time for one complete cycle (s). Period = 1 / frequency. A 50 Hz signal has a 20 ms period.
Planet Radius Km
Distance from centre to edge of a circle. Radius = diameter / 2.
Planet Mass Kg
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Results
orbital altitude (km)
Reference formula or conversion factor shown for context.
orbital radius (km)
The computed radius -- half the diameter.
orbital velocity (km/s)
Reference formula or conversion factor shown for context.
orbital period
Reference formula or conversion factor shown for context.
ISS altitude
Reference formula or conversion factor shown for context.
GEO altitude
Reference formula or conversion factor shown for context.