Small dispinosnub tetrishexacositetrishexacosichoron

The small dispinosnub tetrishexacositetrishexacosichoron, or sedanstuxtux, is a nonconvex uniform polychoron that consists of 1200 small stellated dodecahedra ((some of which lie in the same hyperplanes, forming 600 pentagrammatic snub pseudodisoctahedra), 600 great dodecahedra and 600 icosahedra (forming 600 compounds of one of each), 4800 cubohemioctahedra (forming 2400 compounds of two), 600 rhombidodecadodecahedra, 600 small dodecicosahedra and 600 small icosicosidodecahedra (forming 600 compounds of one of each), and 600 small rhombidodecahedra.

Two small stellated dodecahedra (two compounds), one great dodecahedron and one icosahedron (two compounds), eight cubohemioctahedra (eight compounds), five rhombidodecadodecahedra, five small dodecicosahedra and five small icosicosidodecahedra (ten compounds), and five small rhombidodecahedra join at each vertex.

It can be obtained as the blend of 5 small capped dipentary tetrishecatonicosihexacosichora and 5 small dipentary hecatonicosihexacositrishecatonicosachora. In the process, some of the cubohemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small diretrosnub disnub decahecatonicosadishexacosichoron.