pericenter การใช้

A straight line connecting the pericenter and apocenter is the " line of apsides ".
It is simply a convenient uniform measure of how far around its orbit a body has progressed since pericenter.
It is equal to 0 when the body is at the pericenter, radians ( 180?) at the apocenter, and 2 radians ( 360?) after one complete revolution.
Astronomers commonly express the timing of perihelion relative to the vernal equinox not in terms of days and hours, but rather as an angle of orbital displacement, the so-called longitude of the pericenter.
:: Faster speed and greater gravitational potential both act to create more slowing, so the closest approach in an elliptical orbit ( pericenter ) will have more time dilation than the furthest distance ( apocenter ) . talk ) 10 : 22, 4 November 2014 ( UTC)