/usr/bin/Cenon is in cenon.app 4.0.2-1+b3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/GNUstep/Applications/Cenon.app/Cenon
/usr/bin/../lib/GNUstep/Applications/Cenon.app/Cenon