Bill, thanks for your help. I have downloaded the small file and it's working fine. The big one is taking is time to arrive!

Tony

--- In find_orb@yahoogroups.com, Bill Gray <pluto@...> wrote:
>
> Hi Tony,
>
> The BSP files are "binary SPICE kernel files", not plain old
> JPL ephemeris files. Find_Orb requires the latter; it doesn't know
> anything about SPICE. The file you want (for DE-422, at least) would be
>
> ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux/de422/lnxm3000p3000.422
>
> Save that file to the Find_Orb folder, and it will be found automatically.
>
> This file is about 544 MBytes, and provides coverage from years -3000 to
> +3000. You can get years 1970 to 2020 (plenty for many uses) in a mere 4.7
> MBytes at
>
> http://adams.dm.unipi.it/~orbmaint/orbfit/JPLEPH/DE405.dat
>
> Again, download it and put it in your Find_Orb folder, and it'll be
> automatically detected.
>
> I see that there are some JPL ephemeris files that really should be detected
> that aren't. If you download
>
> http://www.projectpluto.com/jpl_eph.txt
>
> to your Find_Orb folder, then you can get some intermediate-sized
> ephemerides such as this one, covering 1900 to 2053 in 13 MBytes :
>
> ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux/de421/lnxp1900p2053.421
>
> 55 MBytes can get you 1600 to 2200 :
>
> ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux/de405/lnxp1600p2200.405
>
> The most recent version of DE released thus far is DE-430, which includes
> 343 asteroid perturbers. However, the difference for actual orbit determination
> between DE-405 and the more current ephems is almost completely unnoticeable.
>
> -- Bill
>
> On 06/23/2013 06:00 PM, aje160744 wrote:
> > I have file DE422.bsp file obtained from here:
> >
> > ftp://ssd.jpl.nasa.gov/pub/eph/planets/bsp.
> >
> > Now I've got it what do I do with it? I put it in the Find_Orb directory but the program does not seem to recognise it.
> >
> > Thanks for any help.
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>