Verified answer

It is the argument of periapsis. This is the angle between the point of closest approach to the parent body and the point where its orbit crosses the reference plane and is one of the core values in orbital mechanics. I would recommend learning to walk before you can run - that is a fairly advanced paper if you are not familiar with the fundamentals.

I think you mean Tables 3 and 4.

It's some sort of orbital parameter. Based on the fact that it is an angle measured in degrees, that it is marked "N/A" for the circular orbit model (Table 3) and has a value in the table of elliptical orbit fits (Table 4), the most reasonable guess is that it is the orientation of the semi-major axis. But I don't see it defined anywhere in the text. Maybe it's a standard astronomical notation for orbit orientation.

Edit: OK, based on the key words "argument of periapsis" provided by more knowledgeable people, I found this Wiki article.

http://en.wikipedia.org/wiki/Argument_of_periapsis

You'll see in the picture that it is what I guessed, an angle that measures the orientation of the semi-major axis (relative to the "ascending node"). You need a reference plane in order to define it. I'm not sure what that plane would be in characterizing orbits of extrasolar planets but it would be something analogous to our ecliptic.

Omega/minuscle http://en.wikipedia.org/wiki/%CE%A9

Αα Alpha Νν Nu

Ββ Beta Ξξ Xi

Γγ Gamma Οο Omicron

Δδ Delta Ππ Pi

Εε Epsilon Ρρ Rho

Ζζ Zeta Σσς Sigma

Ηη Eta Ττ Tau

Θθ Theta Υυ Upsilon

Ιι Iota Φφ Phi

Κκ Kappa Χχ Chi

Λλ Lambda Ψψ Psi

Μμ Mu Ωω Omega < :)

nice try "search before you ask it" but no. Angular velocity is not measured in degrees.

omega in this case is the "argument of periapsis"

complicated to explain...im pretty sure it would be under a wiki article about Keplerian Orbit.

What would you be looking at this boring stuff for?

Most likely means angular velocity in this context.

http://en.wikipedia.org/wiki/Angular_velocity

It is the official symbol of Bob Saget.

http://www.movieeye.com/celebrity_addresses/upl_im...