Small ditrigonary trishecatonicosihecatonicosachoron

The small ditrigonary trishecatonicosihecatonicosachoron, or siddit thihi, is a nonconvex uniform polychoron that consists of 120 small ditrigonary icosidodecahedra, 120 great icosidodecahedra, 120 icosidodecahedra, and 120 great ditrigonal dodecicosidodecahedra. Two small ditrigonary icosidodecahedra, three great icosidodecahedra, three icosidodecahedra, and six great ditrigonal dodecicosidodecahedra join at each vertex.

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