parabolicAscending function
Time and distance at ascending node for a parabolic orbit.
q perihelion distance (AU), argP argument of perihelion (radians),
timeP time of perihelion (JDE).
Implementation
({double jde, double r}) parabolicAscending(
double q, double argP, double timeP) {
return _pa(-argP, q, timeP);
}