Standard magnitudes

Edward S Light (
Tue, 28 Nov 1995 22:57:07 -0500

As a fledgling satellite observer, I noticed that there seems to be
two different definitions of "standard" magnitudes, namely 1000 km
distance and zero phase angle, and 1000 km distsnce and 90 degrees
phase angle. It seems to me  that the zero phase angle definition is
the more logical. Could someone please explain to me why that is not
the best choice? I use "quicksat" as my source of predictions and, I
believe, it assumes  that the standard magnitudes it uses are for zero
phase angle and have seldom been led astray by its predicted magnitudes.
Thanks for any information  you may provide.

Clear skies!