Hi Stefano,

You have a point: remove those asteroids from 'mpcorb.dat'
and if they still appear in 'comets.dat', Guide will show
them.

I would recommend you do this. Edit the file 'comets.dat'
and delete all the asteroids. Change the number at the top
of the file to reflect the decreased number of objects. After
that, _never_ add asteroids to 'comets.dat'.

(Alternatively, you can go into Extras... Edit Comet Data,
click on each asteroid, on 'OK', and then on 'Delete'. But
that's a bit slower.)

Once upon a time, I thought it made sense to add asteroids
to the program in this way, and the Extras... Add MPC Comets/
Asteroids function still contains links to download asteroid
data of this sort:

Click to download and add critical-list objects
Click to download and add distant objects (TNOs, Centaurs, etc.)
Click to download and add unusual objects (mostly NEOs)
Click to download and add bright asteroids for 2003
Click to download and add bright asteroids for 2004

This has actually turned out _not_ to be a good idea.
If you want to update asteroids, the Best Way to do it is
to use 'mpcorb' instead.

-- Bill