If you look at the list of asteroids on the sitehttps://en.wikipedia.org/wiki/List_of_minor_planets:_1–1000#001
then each record has the color designation of an asteroid belonging to a certain class of orbits:
In the official NASA database on asteroids and cometshttps://ssd.jpl.nasa.gov/sbdb_query.cgi
there is even more detailed asteroids in the class of orbits:
Celestia 1.6.1 has the following options:
"SpectralType" class "Star"
"Type" for a class of "Galaxy"
"Type" for class "Locations"I suggest to include the parameter "TypeOrbit" for 1.7.0
Advantages (additional service):
1) With this parameter, you can group asteroids in the Celestial catalog.
2) In the graphical interface, this parameter can be specified in the information panel Kepler parameters:
3) This option will simplify the management of the visibility of asteroids using lua-files. If now you need a list of asteroids in the Luau file, if you have the option, you just need to specify the orbit type. When creating new asteroids lua-files do not need to be edited.