Disnub dodecadodecahedron

The disnub dodecadodecahedron, disdid, or compound of two snub dodecadodecahedra is a uniform polyhedron compound. It consists of 120 snub triangles, 24 pentagons, and 24 pentagrams (the latter two can combine in pairs due to faces in the same plane). Three triangles, one pentagon, and one pentagram join at each vertex.

Measures
The circumradius R ≈ 1.27444 of the snub dodecadodecahedron with unit edge length is the largest real root of:
 * $$64x^8-192x^6+180x^4-65x^2+8.$$

Its volume V ≈ 36.51284 is given by the largest real root of:
 * $$64x^8-21440x^6+18100x^4+5895625x^2+60062500.$$