|
Planets (+ Pluto): periods and motions
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|
Planet
|
Mean
sidereal period |
Mean
synodic period (days) |
Sidereal
orbital velocity (km/s) |
Sidereal
mean daily motion (degrees) |
Period of axial rotation
|
Inclination of equator to orbit (degrees)
|
|
Mercury
|
87.969 d
|
115.88
|
47.87
|
4.092
|
58.646 d
|
0.01
|
|
Venus
|
224.701 d
|
583.92
|
35.02
|
1.602
|
243.019 d (R)
|
177.36
|
|
Earth
|
365.256 d
|
—
|
29.79
|
0.986
|
23.934 h
|
23.44
|
|
Mars
|
686.980 d
|
779.94
|
24.13
|
0.524
|
24.623 h
|
25.19
|
|
Jupiter
|
11.863 y
|
398.88
|
13.07
|
0.083
|
9.842 h
|
3.13
|
|
Saturn
|
29.447 y
|
378.09
|
9.67
|
0.033
|
10.233 h
|
26.73
|
|
Uranus
|
84.017 y
|
369.66
|
6.84
|
0.012
|
17.240 h (R)
|
97.77
|
|
Neptune
|
164.79 y
|
367.49
|
5.48
|
0.006
|
16.110 h
|
28.33
|
|
Pluto
|
247.92 y
|
366.72
|
4.75
|
0.004
|
6.387 d (R)
|
122.54
|
|
R = retrograde.
The rotation period given for Jupiter is at its equator (System I).
The rotation periods for Uranus and Neptune are those of their magnetic fields.
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