anomalistic

adj

1. Anomalous.
2. Irregular.
3. Of or pertaining to an anomaly (the angle of a body from its perihelion).

   “In Plato's time, when Eudoxus set up his brilliant planetary theory, its observational basis and the knowledge of periods etc. was still quite insufficient. For instance, Eudoxus ignored the sun's anomalistic motion in longitude, but he believed in a motion in latitude which does not exist.”

4. Pertaining to anomalism.