Hi again,

Problem found and fixed! Another installation of Guide did not show
the same cometary position problem and that gave me the hint that I
had better think more deeply about how I had Guide set up.

A few weeks ago I had been "playing" - trying to simulate an "orrery"
view of the solar system. To do so I had moved my location to Sol and
had then set a 3AU offset. When I had finished playing I reset my
location correctly but forgot to fix the offset. Consequently I was
viewing the solar system, including the comets, from a point 3AU above
my location on earth. Changes one's perspective entirely! Nothing
nearby is where you expect it to be.

Sorry about the false alarm.

Regards to all.
Jeff

--- In guide-user@yahoogroups.com, "Jeff Lowrey" <jeff.lowrey@...> wrote:
>
> Hi all,
>
> A couple of weeks ago I created a trail (into the future) for C/2007
> Boattini W1. That trail showed C/2007 W1 in Hydra early in May and
> crossing into Pyxis around May 20. Tonight I did an update on the
> comet data in the usual way .... Extras/Add MPC Comets .... etc.
> Suddenly Guide shows Boattini W1 in Octans, within 5 deg of SCP! Also
> shows a magnitude of 12.1 when recent estimates (within the last 2
> days) place it around 5.4!
> After some checks it appears to me that the MPC data has suddenly
> changed dramatically.
>
> Anyone know what's happening here? ... Or have I goofed again?
>
> Regards
> Jeff
>