Subject: Time: 13:57
OFFICE MEMO "d" following std. mag. Date: 96/12/31
Ted may want to chime in to correct me, but I think a "d" following the
standard magnitude on the nameline of his TLEs stands for "dimensions". In
other words, the standard magnitude value was calculated from the dimensions
of the object. A "v", as you pointed out, is based on visual observations.
--Rob