Acronym	sirfthi
Name	small retrofrustary trishecatonicosachoron
Cross sections	©
Circumradius	sqrt(5) = 2.236068
Vertex figure	©
Colonel of regiment	affixthi
Face vector	3600, 14400, 8880, 360
External links

As abstract polytope sirfthi is isomorphic to gafthi, thereby replacing pentagrams by pentagons and decagons by decagrams, resp. qrid by srid, sidditdid by gidditdid, and sird by gird.

Incidence matrix

3600 ♦    4    4 |    2    4    4    2 |   2   2   2
-----+-----------+---------------------+------------
   2 | 7200    * |    1    1    1    0 |   1   1   1
   2 |    * 7200 |    0    1    1    1 |   1   1   1
-----+-----------+---------------------+------------
   5 |    5    0 | 1440    *    *    * |   1   1   0  {5/2}
   4 |    2    2 |    * 3600    *    * |   1   0   1
  10 |    5    5 |    *    * 1440    * |   0   1   1
   3 |    0    3 |    *    *    * 2400 |   1   1   0
-----+-----------+---------------------+------------
  60 |   60   60 |   12   30    0   20 | 120   *   *  qrid
  60 |   60   60 |   12    0   12   20 |   * 120   *  sidditdid
  60 |   60   60 |    0   30   12    0 |   *   * 120  sird