>Anyway, when plotting the asteroid's position for

my coming local midnight (22

>UT), I notice that the asteroid's symbol (X) and

the Trail I made do not match.

>The starting point of the trail and the asteroid

symbol's position differ by an

>amount of 2.6 minutes of arc with the astroid

symbol offset in PA ~260

>(South-West-West). Not a lot for sure, but I

still find it rather odd that the

>program plots the same data in different

location. As the asteroid brightens and

>speed up it should be easily identified, and the

offset is minor, but I'm

>curious still.

I can reproduce this.

The difference between the trail and the X becomes
larger with time. If
you take today's position as starting point and
plot a trail for several
days, the deviation became 48' - quite a lot !!

By the way in Guide7 2001-5-20 version that thing
does not occur. Asteroid and track position
perfectly
match. It is the asteroid position (X) that shifts
between the versions.

Hartwig