aladin-bin : Interactive software sky atlas ( https://aladin.u-strasbg.fr/aladin.gml )
astrometry : Automated astrometric calibration programs and service ( http://astrometry.net )
erfa : Essential Routines for Fundamental Astronomy ( https://github.com/liberfa/erfa )
healpix : Hierarchical Equal Area isoLatitude Pixelization of a sphere ( http://healpix.sourceforge.net https://healpix.jpl.nasa.gov )
topcat : Interactive graphical viewer and editor for astronomical tables ( http://www.star.bris.ac.uk/~mbt/topcat )
wcslib : Astronomical World Coordinate System transformations library ( https://www.atnf.csiro.au/people/mcalabre/WCS/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a benzene-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/benzene-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org