### REFERENCE: Omega Rolls the Orbit

6. Θ, true anomaly, angle from q to orbiting body’s current position.

3. ω, Argument of Perihelion. Orbital angle from ♈ to q.

4. a, Semimajor Axis is half the distance from q to Q.

2. i, inclination. Angle between Ecliptic plane and orbital plane.

1. Ω, Longitude of Ascending Node, LAN. Angle from Vernal Equinox (♈) to ascending node (☊) as shown.

5. e, eccentricity, ratio of c to a, measures flatness of orbit.

Omega (ω) measures angular "roll" about Sol.

As orbit rolls the orbit about Sol, we notice a few things:

1) Ascension node's (☊) distance from Sol varies Radius (R) from Sol; R ranges from q to Q.

Omega is a static parameter for each
orbit.

But there are many different NEAs each with it’s own orbit and distinct omega.

Take a sample of 36 similar orbits, except let omega vary from 0 to 360°. As
shown in animation.Omega (ω) measures angular "roll" about Sol.

As orbit rolls the orbit about Sol, we notice a few things:

1) Ascension node's (☊) distance from Sol varies Radius (R) from Sol; R ranges from q to Q.

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