Synodic Period Calculator

1/P_syn = |1/P1 - 1/P2|

Orbital Period of Body 1 (days)

Orbital Period of Body 2 (days)

Formula

1/P_syn = |1/P1 - 1/P2|

What is a synodic period?

The synodic period is the time between two successive conjunctions or oppositions of two orbiting bodies as seen from a reference point.

What is the synodic period of Mars?

About 780 days. That is how often Earth and Mars align for optimal launch windows.

Free Kepler third law calculator. Relate orbital period and semi-major axis for any orbiting body.

Free satellite orbital period calculator. Calculate how long it takes a satellite to complete one orbit.

Free angular diameter calculator. Calculate the apparent angular size of an object given its physical size and distance.