Here are the data structures with brief descriptions:

Ccat_entry
Cin_space
Cnovas_delaunay_args
Cnovas_frame
Cnovas_matrix
Cnovas_observable
Cnovas_orbital
Cnovas_orbital_system
Cnovas_planet_bundle
Cnovas_timespec
Cnovas_track
Cnovas_transform
Cobject
Cobserver
Con_surface
Cra_of_cio
Csky_pos