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Calcimator

Orbital Mechanics Calculator

Complete orbital mechanics calculations. Kepler's laws, Hohmann transfers, delta-v, Lagrange points, escape velocities, and relativistic effects.

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How to Use This Calculator
  1. Use the Kepler module to enter semi-major axis (AU) and central mass (solar masses) to compute Orbital Period and Mean Velocity.
  2. In the Hohmann Transfer section, enter departure and arrival orbit radii to get Total Delta-V (km/s) and Transfer Time (days).
  3. Check Lagrange Points to find stable gravitational equilibria β€” L4 and L5 are stable, L1/L2/L3 are unstable.
  4. Use the Roche Limit and Hill Sphere outputs to determine where a satellite will survive vs. be tidally disrupted.
  5. Review the orbital comparison chart against the solar system planets to contextualize your orbit.
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Formula

TΒ² = (4π²/GM)aΒ³ (Kepler's 3rd) | v = √(GM/r) | Ξ”V = v_transfer - v_circular

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