17-4 gyrochoron

The 17-4 gyrochoron, also known as the rocky 17, is a convex isochoric polychoron and member of the gyrochoron family with 17 paratetratruncated truncated tetragonal disphenoids as cells.

Each cell of this polychoron has prodigonal antiprismatic symmetry, with 4 mirror-symmetric octagons, 4 kites, and 4 isosceles triangles for faces.

Compared to other gyrochora with 17 cells, this polychoron has doubled symmetry, because 17 is a factor of 42+1 = 17.