[ColdWater]

Which frame do you want me to refer to in order to answer your query?

[Fichori]

“I haven’t done the calculation but it appears that LeGrande has the principle correct.”

Appearances can be deceiving.

“Which frame do you want me to refer to in order to answer your query?”

Degrees between the absolute apparent and absolute observed positions as observed from earth.

An example would be, 'the moon is x degrees from one side to the other'.