Small retrotrishecatonicosachoron

The small retrotrishecatonicosachoron, or sirthi, is a nonconvex uniform polychoron that consists of 120 quasitruncated small stellated dodecahedra, 120 truncated icosahedra, and 120 icosidodecatruncated icosidodecahedra. Two quasitruncated small stellated dodecahedra, two truncated icosahedra, and four icosidodecatruncated icosidodecahedra join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the small sphenoverted ditrigonal trishecatonicosachoron.