<Tr> <Td> argument of periapsis </Td> <Td> 288.1 ° </Td> </Tr> <Tr> <Td> period </Td> <Td> 365.256 363 004 days </Td> </Tr> <Tr> <Td> average speed </Td> <Td> 29.78 km / s (18.50 mi / s) 107,200 km / h (66,600 mph) </Td> </Tr> <P> The following diagram shows the relation between the line of solstice and the line of apsides of Earth's elliptical orbit . The orbital ellipse goes through each of the six Earth images, which are sequentially the perihelion (periapsis--nearest point to the Sun) on anywhere from January 2 to January 5, the point of March equinox on March 19, 20, or 21, the point of June solstice on June 20, 21, or 22, the aphelion (apoapsis--farthest point from the Sun) on anywhere from July 3 to July 5, the September equinox on September 22, 23, or 24, and the December solstice on December 21, 22, or 23 . The diagram shows an exaggerated shape of Earth's orbit; the actual orbit is less eccentric than pictured . </P>

What is the diameter of earth's orbit around the sun