Orbital Dynamics & Spacecraft Motion Flashcards
1
Q
What is the eccentricity for a circle?
A
0
2
Q
What is the eccentricity of an ellipse?
A
0 < e < 1
3
Q
What shape has eccentricity = 1?
A
Parabola, or rectilinear motion
(since b = a*sqrt(1-e^2))
4
Q
What shape has eccentricity > 1?
A
Hyperbola
5
Q
What is true anomaly f?
A
The angle from perhaps to r measured from the focus (Earth)
6
Q
What is eccentric anomaly E?
A
If the orbit is “stretched” along the semi-minor axis to a circle, E is the angle to the projected position measured from the center of the circle.
7
Q
What is Newton’s law of universal gravitation?
A
F = G*(M1 * M2) / r^2
