Just knowing the major axis and the eccentricity will allow you to calculate the<span> perihelion and aphelion.
Source: http://www.1728.org/ellipse.htm</span>
https://www.steilacoom.k12.wa.us/cms/lib4/WA01001786/Centricity/Domain/490/Probability%20Notes%20Answers.pdf
this should have every thing on it hope it helps
The change in elevation is -15 meters
