Small tritrigonary hecatonicosidishexacositrishecatonicosachoron

The small tritrigonary hecatonicosidishexacositrishecatonicosachoron, or sit thiddixthi, is a nonconvex uniform polychoron that consists of 120 great ditrigonary icosidodecahedra, 600 tetrahedra, 600 cuboctahedra, 120 small rhombidodecahedra, 120 small dodecicosahedra, and 120 truncated icosahedra. One great ditrigonary icosidodecahedron, one tetrahedron, three cuboctahedra, three small rhombidodecahedra, three small dodecicosahedra, and three truncated icosahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small tritrigonary prismatohecatonicosidishexacosichoron.