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Calcimator

Launch Window Calculator

Calculate synodic period, optimal wait time, and transfer time for interplanetary or orbital launch windows.

Inputs

days
days
°
°

Results

Synodic Period

779.88 days

Wait Time to Launch

4.01 days

Transfer Time263.06 days
Total Mission Time267.07 days
How to Use This Calculator
  1. Enter the orbital periods (days) of the origin body (Earth) and target body (Mars, Venus, etc.).
  2. Set the current phase angle between the two bodies and the required transfer angle.
  3. Review synodic period (days), wait time until next launch window, and Hohmann transfer time.
  4. Use the total mission time to plan crew consumables, power budgets, and mission duration constraints.
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