I started using the software that comes with Jean Meeus book Astronomical Algorithms. I am now using the updated code from naughter(dot)com/aa.html.
I am able to calculate the heliocentric longitude and latitude for an asteroid using the orbital elements. Below is for the asteroid Juno. I can't find any source code or instructions for converting the asteroid coordinates I calculated below to geocentric longitude and latitude. Can anyone recommend a method to find asteroid geocentric longitude and latitude? Thanks.
double Longitude = 0.0; //West Greenwich
double Latitude = 51.4826; //North Greenwich
double TZOffSet = 0.0;
//Asteroid Juno Elements; Using epoch J2000
CAAEllipticalObjectElements elements;
//Calculation Julian Date 2017, 9, 25
elements.JDEquinox = JD;
elements.T = (JD - 2451545.0) / 36525.0;
//semi-major axis of the orbit
elements.a = 2.6700912;
//eccentricity of the orbit
elements.e = 0.25498122;
//inclination of the plane of the ecliptic
elements.i = 12.98211;
//Longitude of ascending node
elements.omega = 169.91138;
//longitude of perihelion
elements.w = 248.10807;
//-------------------------------------------------------------------------
CAAEllipticalObjectDetails details = CAAElliptical::Calculate(JD, elements, true);
1) Heliocentric Ecliptic Longitude = 215.6670202
2) Heliocentric Ecliptic Latitude = 9.377841131
3) True Geocentric RA = 13.90415220
4) True Geocentric Declination = -3.802673727
5) True Geocentric Distance = 4.136531368
6) True Geocentric Light Time = 0.0238906126
7) Astrometric Geocentric RA = 13.90397025
8) Astrometric Geocentric Declination = -3.80217202
9) Astrometric Geocentric Distance = 4.13653445
10) Astrometric Geocentric Light Time = 0.023890630
11) Elongation = 26.74464206
12) Phase Angle = 7.928218201
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