The planet neptune is the farthest planet from the sun. a satellite is orbiting around neptune at a distance of 180 km. as the satellite orbits, only a portion of the planet may be seen at one time. this is referred to as the horizon circle and denoted by the variable 2004-05-03-06-00_files/i0260001.jpg . the distance between the satellite and the horizon circle 2004-05-03-06-00_files/i0260002.jpg is 2,992 km. find the approximate diameter of the planet neptune. round your final answer to the nearest kilometer.