<Dd> 1 P s y n = 1 P 1 − 1 P 2 (\ displaystyle (\ frac (1) (P_ (\ mathrm (syn)))) = (\ frac (1) (P_ (1))) - (\ frac (1) (P_ (2)))) </Dd> <P> Table of synodic periods in the Solar System, relative to Earth: </P> <Table> <Tr> <Th> Object </Th> <Th> Sidereal period (yr) </Th> <Th> Synodic period (yr) </Th> <Th> Synodic period (d) </Th> </Tr> <Tr> <Td> Mercury </Td> <Td> 0.240846 (87.9691 days) </Td> <Td> 0.317 </Td> <Td> 115.88 </Td> </Tr> <Tr> <Td> Venus </Td> <Td> 0.615 (225 days) </Td> <Td> 1.599 </Td> <Td> 583.9 </Td> </Tr> <Tr> <Td> Earth </Td> <Td> 1 (365.25636 solar days) </Td> <Td>--</Td> <Td>--</Td> </Tr> <Tr> <Td> Moon </Td> <Td> 0.0748 (27.32 days) </Td> <Td> 0.0809 </Td> <Td> 29.5306 </Td> </Tr> <Tr> <Td> 99942 Apophis (near - Earth asteroid) </Td> <Td> 0.886 </Td> <Td> 7.769 </Td> <Td> 2,837.6 </Td> </Tr> <Tr> <Td> Mars </Td> <Td> 1.881 </Td> <Td> 2.135 </Td> <Td> 779.9 </Td> </Tr> <Tr> <Td> 4 Vesta </Td> <Td> 3.629 </Td> <Td> 1.380 </Td> <Td> 504.0 </Td> </Tr> <Tr> <Td> 1 Ceres </Td> <Td> 4.600 </Td> <Td> 1.278 </Td> <Td> 466.7 </Td> </Tr> <Tr> <Td> 10 Hygiea </Td> <Td> 5.557 </Td> <Td> 1.219 </Td> <Td> 445.4 </Td> </Tr> <Tr> <Td> Jupiter </Td> <Td> 11.86 </Td> <Td> 1.092 </Td> <Td> 398.9 </Td> </Tr> <Tr> <Td> Saturn </Td> <Td> 29.46 </Td> <Td> 1.035 </Td> <Td> 378.1 </Td> </Tr> <Tr> <Td> Uranus </Td> <Td> 84.01 </Td> <Td> 1.012 </Td> <Td> 369.7 </Td> </Tr> <Tr> <Td> Neptune </Td> <Td> 164.8 </Td> <Td> 1.006 </Td> <Td> 367.5 </Td> </Tr> <Tr> <Td> 134340 Pluto </Td> <Td> 248.1 </Td> <Td> 1.004 </Td> <Td> 366.7 </Td> </Tr> <Tr> <Td> 136199 Eris </Td> <Td> 557 </Td> <Td> 1.002 </Td> <Td> 365.9 </Td> </Tr> <Tr> <Td> 90377 Sedna </Td> <Td> 12050 </Td> <Td> 1.00001 </Td> <Td> 365.1 </Td> </Tr> </Table> <Tr> <Th> Object </Th> <Th> Sidereal period (yr) </Th> <Th> Synodic period (yr) </Th> <Th> Synodic period (d) </Th> </Tr>

Time to orbit the sun in earth days