/usr/ is in libastro-dev 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/astro/
/usr/include/astro/astr2lib.h
/usr/include/astro/astrolib.h
/usr/include/astro/astrolib_export.h
/usr/include/astro/attlib.h
/usr/include/astro/eclsolar.h
/usr/include/astro/planetarySats.h
/usr/include/astro/solarsystem.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Astro/
/usr/lib/x86_64-linux-gnu/cmake/Astro/AstroConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/Astro/AstroConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/Astro/AstroTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/Astro/AstroTargets.cmake
/usr/share/
/usr/share/doc/
/usr/share/doc/libastro-dev/
/usr/share/doc/libastro-dev/copyright
/usr/lib/x86_64-linux-gnu/libastro.so
/usr/share/doc/libastro-dev/changelog.Debian.gz