Small ditrigonary hecatonicositrishecatonicosihexacosichoron

The small ditrigonary hecatonicositrishecatonicosihexacosichoron, or sidthithix, is a nonconvex uniform polychoron that consists of 120 great icosidodecahedra, 600 octahedra, 120 rhombidodecadodecahedra, 120 great icosicosidodecahedra, and 120 small dodecicosahedra. Three great icosidodecahedra, three octahedra, six rhombidodecadodecahedra, six great icosicosidodecahedra, and six small dodecicosahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the rectified small ditrigonary hexacosihecatonicosachoron.