Target Vector Elements -- Incoming Asymptote

If you select Target Vector Incoming Asymptote as the Coordinate Type, the following six components need to be specified:

Element	Description
Radius of Periapsis	Distance from the center of mass of the central body to the periapsis of the hyperbolic orbit (rp in the illustration). Enter a value in the selected distance unit.
C3 Energy	The energy of the orbit, computed as -/a, where is the gravity constant of the central body and a is the semimajor axis. Enter a value in the selected distance unit squared per selected time unit squared.
Right Ascension of Incoming Asymptote	The right ascension of the hyperbolic incoming asymptote in the selected coordinate system. Enter a value in the selected angle unit.
Declination of Incoming Asymptote	The declination of the incoming asymptote in the selected coordinate system. Enter a value in the selected angle unit.
Velocity Azimuth at Periapsis	The inertial flight path azimuth of the trajectory measured at periapsis. Enter a value in the selected angle unit.
True Anomaly	The angle from the periapsis of the orbit to the spacecraft's position vector, measured in the direction of spacecraft motion (the angle in the illustration). Enter a value in the selected angle unit.

In the drawing below, and represent the incoming and outgoing asymptotes, respectively:

Target Vector Elements -- Outgoing Asymptote

If you select Target Vector Outgoing Asymptote as the Coordinate Type, the components to be specified are the same as those in the Incoming Asymptote type, except that (as you might expect) Right Ascension and Declination are defined in terms of the outgoing rather than the incoming asymptote.