Small rhombic hecatonicosihecatonicosachoron

The small rhombic hecatonicosihecatonicosachoron, or sirhihy, is a nonconvex uniform polychoron that consists of 120 truncated great dodecahedra, 120 small rhombidodecahedra, and 720 pentagrammic prisms. Two truncated great dodecahedra, two small rhombidodecahedra, and two pentagrammic prisms join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the small rhombated grand hecatonicosachoron.