Which two numbers would you need to calculate the eccentricity of an object's orbit?

Similarities between spain and the us? in terms of culture, foods, people, schedules, holidays, anything.

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?

"six months ago, several of molly's friends joined the trimtime fitness center. each of them participated in trimtime's weight-reduction and fitness regimen. all reported substantial weight reduction, and all are visibly slimmer. molly is convinced. she joins trimtime and enrolls in the program, hoping and expecting to see the same results. she is especially delighted to learn that trimtime had adjusted its program to make it even more effective in a shorter period of time." what is the feature in question/attribute of interest in this argument?