An asteroid has an aphelion distance of 4.6 A.U. and a perihelion distance of 1.8 A.U. How do you calculate the orbital semi major axis, eccentricity, and period?
Semi major axis a = 3.2 AU. Eccentricity e = 0.4375. Period
Aphelion = a(1+e) = 4.6 AU.
a = (4.6+1.8)/2 AU = 3.2 AU.
In the case of the Earth, a = 1 AU and period is 1 Earth year.
Now, the period of the asteroid