会合周期计算器
使用此会合周期计算器快速获得准确的计算结果。
days
days
Synodic Period
779.88 days
Synodic Period (years)2.1352 yr
Synodic Period vs Inner Body Period
公式
## Synodic Period The synodic period is the time between identical relative configurations of two orbiting bodies. ### Formula **1/P_syn = |1/P1 - 1/P2|** where P1 and P2 are the sidereal orbital periods.
计算示例
Find the synodic period of Mars as seen from Earth.
- 011/P_syn = |1/365.25 - 1/687|
- 02= |0.002738 - 0.001456| = 0.001282
- 03P_syn = 1/0.001282 ≈ 780 days ≈ 2.14 years
常见问题
What does synodic period mean practically?
It tells you how often a planet returns to the same position relative to Earth and the Sun, like how often Mars is at opposition.
Why is it different from the sidereal period?
The sidereal period is measured against fixed stars. The synodic period accounts for the observer also moving in orbit.
Does this work for moons?
Yes, for any two bodies orbiting the same central body.