Acronym	grad tathi
Name	great retroditetrahedronary trishecatonicosachoron
Cross sections	©
Circumradius	sqrt(2) = 1.414214
General of army	hi
Colonel of regiment	dattady
Face vector	600, 3600, 5280, 360
Confer	gefirdit xethi
External links

As abstract polytope grad tathi is isomorphic to gridtathi, thereby interchanging the roles of pentagrams and pentagons, resp. replacing gissid by doe and gidtid by sidtid.

Incidence matrix according to Dynkin symbol

600 |   12 |    6   12   12   12 |   4   4  12
----+------+---------------------+------------
  2 | 3600 |    1    2    2    2 |   1   2   4
----+------+---------------------+------------
  3 |    3 | 1200    *    *    * |   0   2   0
  5 |    5 |    * 1440    *    * |   0   1   1 {5}
  5 |    5 |    *    * 1440    * |   1   0   1 {5/2}
  6 |    6 |    *    *    * 1200 |   0   0   2
----+------+---------------------+------------
 20 |   30 |    0    0   12    0 | 120   *   * gissid
 20 |   60 |   20   12    0    0 |   * 120   * gidtid
 60 |  120 |    0   12   12   20 |   *   * 120 ided