Liturgical Ephemeris

From the Lexicon:

Liturgical Ephemeris (noun):  Table, chart, or database giving the ritual motion of celestial and sub-celestial objects for the given day.  The sub-celestial objects are typically knotted or aspirated clouds, air (clotted or otherwise), or persons and objects engaged in flight (voluntary or not).

A complete ephemeris will list those motions which are wholly optional, those motions which are attained by cost of momentum, and the proper rituals to be observed in order to avoid premature union with the ground.