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

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

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    *    * |   1   0   1 {5}
  5 |    5 |    *    * 1440    * |   0   1   1 {5/2}
  6 |    6 |    *    *    * 1200 |   0   0   2
----+------+---------------------+------------
 20 |   30 |    0   12    0    0 | 120   *   * doe
 20 |   60 |   20    0   12    0 |   * 120   * sidtid
 60 |  120 |    0   12   12   20 |   *   * 120 ided