Synodic Period Calculator

Find the synodic period between two orbiting bodies.

Synodic period (days) 779.88

Formula: 1/T_syn = |1/T₁ − 1/T₂|

Step-by-step with your numbers:

1. Values used:

2. Period 1 = 365.25 days

3. Period 2 = 687 days

5. Synodic period = 779.88days

Did we solve your problem today?

The synodic period is how often two orbiting bodies line up again as seen from one another.

The math behind it

1/T_syn = |1/T₁ − 1/T₂|. It governs launch windows between planets.

Earth (365.25 d) and Mars (687 d) → about 779 days.

Why does it matter for missions?

Mars launch windows recur each synodic period (~26 months).