Small tritrigonary hecatonicosihexacosidishecatonicosachoron

The small tritrigonary hecatonicosihexacosidishecatonicosachoron, or sit thixady, is a nonconvex uniform polychoron that consists of 600 regular tetrahedra, 120 truncated dodecahedra, 120 small ditrigonal dodecicosidodecahedra, and 120 small ditrigonary icosidodecahedra. 1 tetrahedron, 3 truncated dodecahedra, 3 small ditrigonal dodecicosidodecahedra, and 1 small ditrigonary icosidodecahedron join at each vertex.

It is in the same regiment as the small tritrigonary prismatohecatonicosidishexacosichoron.