The Point in a Lunar Orbit Nearest the Surface of the Moon

question 63

Essay

The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune.The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude and apolune altitude (above the moon).Find an equation of this ellipse if the radius of the moon is and the center of the moon is at one focus.

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Definitions:

Excess Reserves

The amount of reserves that a bank holds beyond the required minimum, often held in the central bank to lend to other banks or as currency in circulation.

Required Reserves

The minimum amount of funds that a bank is required to hold in reserve against deposits, as mandated by central banking regulations.

Demand Deposits

Bank accounts that allow the holder to withdraw funds without prior notice, such as checking accounts.

Time Deposits

Savings accounts or certificates of deposit that hold a fixed sum of money for a specified period of time, during which the depositor cannot withdraw the funds without penalty.