Orbital Mechanics Concepts

Front

What is the difference between Apogee and Perigee?

Back

Perigee is the point in an orbit closest to Earth (highest speed), while Apogee is the point farthest away (lowest speed).

Front

What does 'Eccentricity' (e) measure?

Back

The 'roundness' of an orbit: e=0 is a perfect circle, 0

Front

How does orbital period relate to distance?

Back

According to Kepler’s Third Law, the greater the orbital radius (semi-major axis), the longer the orbital period.

Front

What defines a Geostationary Orbit (GEO)?

Back

An orbit with a period of 24 hours, allowing a satellite to remain fixed over a single spot on Earth's equator.

Front

What is the 'Vis-viva' equation used for?

Back

It is a primary tool for calculating the velocity of an orbiting body at any point along its elliptical path.

Front

What is 'True Anomaly'?

Back

The angle that describes a satellite's exact location within its orbit, measured from the perigee point.