Is Iridium visible in the daytime?
Fri, 26 Sep 1997 15:36:22 -0700

If the Iridiums have a mirrored surfaced normal to the velocity vector
(which I will assume is parallel to the earth's surface) then you could
see a flare in the daytime.  Imagine that an Iridium is going to make a
90 degree pass and that it will cross the sun (or at least come near).
You should see a flare when the Iridium is at the same altitude as the
sun and 180 away in azimuth.  This assumes that the mirrored side is
sunward.  Of course there are probably other more complicated
circumstances that would produce a daytime flare.  I was just trying to
show that it is possible.
				Randy John