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Venus rotates clockwise, and Uranus has been knocked on its side and rotates almost perpendicular to the rest of the Solar System. The ecliptic remains within 3° of the invariable plane over five million years, [2] but is now inclined about 23.44° to Earth's celestial equator used for the coordinates of poles. This large inclination means ...
1.00 days (24 h 00 m 00 s) Moon: 27.321661 days [7] (equal to sidereal orbital period due to spin-orbit locking, a sidereal lunar month) 27 d 7 h 43 m 11.5 s: 29.530588 days [7] (equal to synodic orbital period, due to spin-orbit locking, a synodic lunar month) none (due to spin-orbit locking) Mars: 1.02595675 days [3] 1 d 0 h 37 m 22.663 s: 1. ...
The 3:4, 3:5, 4:7 and 2:5 resonances are less populated. [150] Neptune has a number of known trojan objects occupying both the Sun–Neptune L 4 and L 5 Lagrangian points—gravitationally stable regions leading and trailing Neptune in its orbit, respectively. [151] Neptune trojans can be viewed as being in a 1:1 resonance with Neptune.
(455502) 2003 UZ 413 (provisional designation 2003 UZ 413) is a trans-Neptunian object (TNO) with an absolute magnitude of 4.38. [5] It is in a 2:3 orbital resonance with Neptune, thus it is classified as a plutino. [3] There are indications it may be dense enough to be a dwarf planet. It was given the minor planet number 455502 on 22 February ...
Triton's orbit precesses forward relative to Neptune's rotation with a period of about 678 Earth years (4.1 Neptunian years), [4] [5] making its Neptune-orbit-relative inclination vary between 127° and 173°. That inclination is currently 130°; Triton's orbit is now near its maximum departure from coplanarity with Neptune's.
Other resonances also exist at 3:4, 3:5, 4:7, and 2:5. [26]: 104 Neptune has a number of trojan objects, which occupy its Lagrangian points, gravitationally stable regions leading and trailing it in its orbit. Neptune trojans are in a 1:1 mean-motion resonance with Neptune and often have very stable orbits.
Mercury's sidereal day is about two-thirds of its orbital period, so by the prograde formula its solar day lasts for two revolutions around the Sun – three times as long as its sidereal day. Venus rotates retrograde with a sidereal day lasting about 243.0 Earth days, or about 1.08 times its orbital period of 224.7 Earth days; hence by the ...
The orbits are ellipses, with foci F 1 and F 2 for Planet 1, and F 1 and F 3 for Planet 2. The Sun is at F 1. The shaded areas A 1 and A 2 are equal, and are swept out in equal times by Planet 1's orbit. The ratio of Planet 1's orbit time to Planet 2's is (/) /.