Name | Description |
---|---|
J2000 Ecliptic | Crossings through the ecliptic plane as defined at the J2000 epoch (the ecliptic pole is the mean rotational axis of the Earth at the J2000 Epoch). |
Mean Ecliptic of Date | Crossings through the ecliptic plane as defined by the mean ecliptic plane of date (the ecliptic pole is the mean rotational axis of the Earth at the given time). Note: Mean of date accounts for precession but not nutation. |
True Ecliptic of Date | Crossings through the ecliptic plane as defined by the true ecliptic plane of date (the ecliptic pole is the true rotational axis of the Earth at the given time). |
STK Programming Interface 11.0.1