In the case of a planet's Deimos's synodic period is 1.2648 days, 0.18 % longer than Deimos's sidereal period of 1.2624 d.
12.
This imparts on an observer an angular velocity of \ d \ theta / dt of 2 " ? " divided by the sidereal period of the Earth's rotation, 86162.4 seconds.
13.
To go roughly 2 * pi * 3.84399E8 m therefore takes about 2357402 s = 27.284 days, which given the approximation of a circular orbit is pretty damn close to the actual 27.321 day actual sidereal period.
14.
:If we look at the sidereal period and equatorial radius of each planet from Earth to Neptune, it looks like the sidereal period is approximately equal to one day multiplied by the inverse of the cube root of radius ( in Earths ):
15.
:If we look at the sidereal period and equatorial radius of each planet from Earth to Neptune, it looks like the sidereal period is approximately equal to one day multiplied by the inverse of the cube root of radius ( in Earths ):
16.
For example, Venus's year ( sidereal period ) is 225 days, and Earth's is 365 days . Thus Venus's synodic period, which gives the time between two subsequent eastern ( or western ) greatest elongations, is 584 days.
17.
However, the ratio of orbital periods in a stable orbital resonance will in the long term approach an average that's an exact ratio of integers if you're counting anomalistic periods instead of sidereal periods . talk ) 04 : 35, 27 April 2012 ( UTC)
18.
During such planet's orbital period of 0.6 ( 3 ) sidereal period of approximately eighty years means that this star would move through the local ecliptic as slowly as Uranus with its eighty-four year period, but as the orbit of Alpha Centauri A is more elliptical, its apparent magnitude will be far more variable.
