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THE FEUTEX TOOLKIT

Synodic Alignment Period

Estimate the time between repeated alignments of two bodies with constant orbital periods.

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FormulaSynodic period = 1/abs(1/p1-1/p2); Relative angular rate = 360*abs(1/p1-1/p2)
Sources and model references

Worked example

Inputs

First orbital period
365.25 days
Second orbital period
730.5 days

Expected results

Synodic period
730.5 days
Relative angular rate
0.4928131417 degrees/day

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Estimate the time between repeated alignments of two bodies with constant orbital periods.
  2. Set first orbital period, second orbital period in the indicated units.
  3. Calculate and compare synodic period, relative angular rate.

Try this example

{
  "p1": 365.25,
  "p2": 730.5
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.