Kostenloser Sidereal-to-Synodic Umrechner
Convert between sidereal und synodic periods for any planet. Kostenloser Online astronomy converter.
Synodic Period
583.93 days
Synodic Period vs Planet Sidereal Period
Formel
## Sidereal and Synodic Periods A planet's **sidereal period** is its true orbital period. Its **synodic period** is how long between repeated alignments as viewed from Earth. ### Formula **1/P_syn = |1/P_planet - 1/P_Earth|**
Lösungsbeispiel
Venus has a sidereal period of 224.7 days.
- 011/P_syn = |1/224.7 - 1/365.25|
- 02= |0.004451 - 0.002738| = 0.001713
- 03P_syn = 1/0.001713 ≈ 583.9 days
Häufig Gestellte Fragen
Which planets have the longest synodic periods?
Planets whose sidereal periods are closest to Earth's. Mars (780 days) has a longer synodic period than Jupiter (399 days).
Can synodic be shorter than sidereal?
Yes. For distant planets the synodic period approaches one Earth year, shorter than the planet's sidereal period.
Why does this matter for observation?
The synodic period determines how often you get favourable viewing geometry like opposition or greatest elongation.