Make sure that your location longitude and latitude are correct and
that your pc clock is very precise.

Chris. Spratt
Victoria, BC

--- In guide-user@yahoogroups.com, "Claudio Costa" <c.costa@m...> wrote:
> Bill,
> I checked the occultation of HIP 83097 by 7 Iris on May the 22nd at 22h
> 1.4m UTC following the prediction by Ian Manek of IOTA es: with
> surprise I found that Guide 8 (25 Feb version) places Iris 3.3 minutes
> of arc off the target star. I downloaded the most recent version of
> MPCORB from the Minor Planet Center web site. Same result.
> Any idea?
>
> Thanks,
> Claudio Costa