> These are "elements". An ephemeris is just a list of positions for
an object
> based on time, as seen from a given location. Elements are numbers that
> describe the orbit, so CdC can calculate the position for any time,
from any
> location.
Duh... You're right, of course. I knew that... (sfx hand slapping
forehead).
> As an alternative, I just uploaded a file "asteroides.dat" which
contains the
> same data in the form normally used in the "asteroides.dat" file CdC
normally
> gets from the Minor Planet Center. Just substitute it for the
asteroides.dat
> file in your ..\cile\cat\planet folder (or use a text editor to append)
>
> (the original asteroides.dat file is much smaller than astorb, so
it's easier
> to replace if you do something wrong. Just click "asteroid
elements" at the
> bottom of the asteroids window to download a fresh standard copy
from the MPC)
OK.
> Once you've zoomed in, you can use the "internet resources" (globe
icon) to
> download stars from USNO-A or B to get stars down to mag 20.
I'll have to try that. I have the condensed Palomar Sky Survey on CD
so that's what I've been using.
The neat thing about CdC is that one keeps finding new features or
ways to use it.
Pete
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