A comet of mass 1.3 1010 kg moves in an elliptical orbit around the Sun. Its distance from the Sun ranges between 0.545 AU and 79.0 AU. Note: 1 AU = one astronomical unit = the average distance from the Sun to the Earth = 1.496 1011 m.
(a) What is the eccentricity of its orbit?
(b) What is its period?
yr
(c) At aphelion what is the potential energy of the comet-Sun system?
J