Thanks Ralf. By the way, I solved the failed automatic update problem. The Comets.dat file got somehow corrupted. It contained a single number. I erased that number and reconnected with MPC. This time the download was flawless and C/2012 S1 showed up very bright in November 2013!
Claudio

--- In guide-user@yahoogroups.com, "ralf.schoenfeld" <ralf.schoenfeld@...> wrote:
>
> Hi Claudio,
>
> add the comet by hand (Extras/Asteroids and Comets):
>
> Orbital elements:
> C/2012 S1 (ISON)
> Epoch 2013 Dec. 14.0 TT = JDT 2456640.5
> T 2013 Nov. 28.87041 TT MPC
> q 0.0124527 (2000.0) P Q
> z +0.0000029 Peri. 345.56137 +0.31509387 +0.51287068
> +/-0.0002325 Node 295.65952 -0.75896421 -0.36901142
> e 1.0000000 Incl. 62.36426 -0.56981504 +0.77510918
>
> H is about 5.2 (G = 5 ?)
>
> clear skies
> Ralf
>
> --- In guide-user@yahoogroups.com, "Claudio" <c.costa@> wrote:
> >
> > Hi Bill,
> >
> > today I tried to update the comets in Guide because I wanted to display the position of the new comet C/2012 S1 which is promising to give a good show in November. But Guide 9 crashed after trying to connect with MPC to download the nei comets data file.
> >
> > Any idea?
> >
> > Thanks,
> > Claudio
> >
>