argumentOfPeriapsis property
Argument of Periapsis In Degrees.
Now that we’ve oriented the orbital plane in space, we need to orient the orbit ellipse in the orbital plane. We do this by specifying a single angle known as argument of perigee.
A few words about elliptical orbits… The point where the satellite is closest to the earth is called perigee, although it’s sometimes called periapsis or perifocus.We’ll call it perigee. The point where the satellite is farthest from earth is called apogee (aka apoapsis, or apifocus). If we draw a line from perigee to apogee, this line is called the line-of-apsides. (Apsides is, of course, the plural of apsis.) I know, this is getting complicated again.Sometimes the line-of-apsides is called the major-axis of the ellipse.It’s just a line drawn through the ellipse the “long way”.
The line-of-apsides passes through the center of the earth. We’ve already identified another line passing through the center of the earth: the line of nodes. The angle between these two lines is called the argument of perigee.Where any two lines intersect, they form two supplementary angles, so to be specific, we say that argument of perigee is the angle (measured at the center of the earth) from the ascending node to perigee.
Example: When ARGP = 0, the perigee occurs at the same place as the ascending node.That means that the satellite would be closest to earth just as it rises up over the equator. When ARGP = 180 degrees, apogee would occur at the same place as the ascending node.That means that the satellite would be farthest from earth just as it rises up over the equator.
By convention, ARGP is an angle between 0 and 360 degrees.
Implementation
final double argumentOfPeriapsis;