/usr/lib/x86_64-linux-gnu/libsiscone_spherical.so.0 is in libsiscone-spherical0v5 2.0.6-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsiscone_spherical.so.0.0.0
/usr/lib/x86_64-linux-gnu/libsiscone_spherical.so.0.0.0