<s>[INST] Mercury's orbit is elliptical shape having its aphelion at about 46 million miles and perihelion at about 28.6 million miles. Mercury is at the perihelion position in its orbit. Assuming that the distance travelled by the planet from its perihelion to aphelion is about half the major axis of its elliptical orbit and since Mercury takes about 88 days to complete its orbit, determine[/INST]