--- plalbrecht <[EMAIL PROTECTED]> wrote:
> I've added an ephemeris
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.
> for the three new "planets" announced a few days ago,
Only one is "claimed" to be a planet, since it appears to be bigger than Pluto.
> to the Files section. The file is named newplanets.dat
>
> To use this in Cartes du Ciel,
>
> --> hopefully you're not using the huge astorb.dat file (for every
> asteroid known to God or man, nearly 300,000 objects) already; this
> will write over it. If so, and if you need/want to keep the existing
> astorb file, just use a text editor to append these three objects to
> your existing astorb.dat or temporarily rename it.
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)
The following direction are mostly the same for this file:
> 1. rename the downloaded new planets file to astorb.dat
(leave as asteroides.dat)
> 2. copy it to the folder ...\Ciel\cat\planet
> 3. in Cartes du Ciel,
> a. click on "catalog and objects parameters" in the left margin;
> b. click on "asteroids" tab at top;
In my version, you will already see the three new objects listed in the window.
> c. under "source," select "astorb" and hit "refresh"
This step then is not needed.
> d. the three object names should appear in the window. Select
> which you want to find, or shift-click to select all three. This
> "arms" them for searches in the main CdC window
> e. hit OK to close the window
> 4. in the main CdC window,
> a. click on "search" in the top margin,
> b. click on "find," "solar system," select "asteroids," and your
> three objects should be listed.
> c. Select which one you want to go to and hit "OK." An arrow will
> appear on the chart (if the object is up) showing its location.
>
>
> These objects are very faint, mag 17 or 18, much fainter than the
> stars shown in CdC. It helps to have something like the Palomar Sky
> Survey to display the fainter stars in the area.
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.
-John
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