diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 985d2ea99..bec5aa743 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -66,6 +66,7 @@ SET(FAST_MATH_FILES
             ${SRC}/rmvs/rmvs_module.f90
             ${SRC}/helio/helio_module.f90
             ${SRC}/symba/symba_module.f90
+            ${SRC}/shgrav/shgrav_module.f90
             ${SRC}/collision/collision_check.f90  
             ${SRC}/collision/collision_regime.f90   
             ${SRC}/collision/collision_resolve.f90  
diff --git a/src/base/base_module.f90 b/src/base/base_module.f90
index 8be20f9d3..6f0821b70 100644
--- a/src/base/base_module.f90
+++ b/src/base/base_module.f90
@@ -2249,39 +2249,39 @@ subroutine base_coclone_param(self)
          call coclone(self%collision_model)
          call coclone(self%encounter_save)
          call coclone(self%lenc_save_trajectory)
-         call coclone(self%lenc_save_closest   )
-         call coclone(self%interaction_loops   )
+         call coclone(self%lenc_save_closest)
+         call coclone(self%interaction_loops)
          call coclone(self%encounter_check_plpl)
          call coclone(self%encounter_check_pltp)
          call coclone(self%lflatten_interactions)
          call coclone(self%lencounter_sas_plpl)
-         call coclone(self%lencounter_sas_pltp      )
+         call coclone(self%lencounter_sas_pltp)
          call coclone(self%lrhill_present)
-         call coclone(self%lextra_force  )
-         call coclone(self%lbig_discard  )
-         call coclone(self%lclose        )
-         call coclone(self%lenergy       )
-         call coclone(self%loblatecb     )
-         call coclone(self%lrotation     )
-         call coclone(self%ltides        )
-         call coclone(self%E_orbit_orig )
-         call coclone(self%GMtot_orig  )
+         call coclone(self%lextra_force)
+         call coclone(self%lbig_discard)
+         call coclone(self%lclose)
+         call coclone(self%lenergy)
+         call coclone(self%loblatecb)
+         call coclone(self%lrotation)
+         call coclone(self%ltides)
+         call coclone(self%E_orbit_orig)
+         call coclone(self%GMtot_orig)
          call coclonevec(self%L_total_orig)
          call coclonevec(self%L_orbit_orig)
          call coclonevec(self%L_spin_orig)
          call coclonevec(self%L_escape)
-         call coclone(self%GMescape    )
-         call coclone(self%E_collisions )
-         call coclone(self%E_untracked  )
+         call coclone(self%GMescape)
+         call coclone(self%E_collisions)
+         call coclone(self%E_untracked)
          call coclone(self%lfirstenergy)
-         call coclone(self%lfirstkick  )
-         call coclone(self%lrestart    )
+         call coclone(self%lfirstkick)
+         call coclone(self%lrestart)
          call coclone(self%display_style)
-         call coclone(self%display_unit )
+         call coclone(self%display_unit)
          call coclone(self%log_output )
-         call coclone(self%lgr       )
+         call coclone(self%lgr)
          call coclone(self%lyarkovsky)
-         call coclone(self%lyorp     )
+         call coclone(self%lyorp)
          call coclone(self%seed)
          call coclone(self%lcoarray)
 
diff --git a/src/shgrav/shgrav_module.f90 b/src/shgrav/shgrav_module.f90
new file mode 100644
index 000000000..0007bb2af
--- /dev/null
+++ b/src/shgrav/shgrav_module.f90
@@ -0,0 +1,20 @@
+! Copyight 2024 - The Minton Group at Purdue University
+! This file is part of Swiftest.
+! Swiftest is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License 
+! as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+! Swiftest is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty 
+! of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+! You should have received a copy of the GNU General Public License along with Swiftest. 
+! If not, see: https://www.gnu.org/licenses. 
+
+module shgrav
+    !! author: David A. Minton and Kaustub Anand
+    !!
+    !! This module defines functions used for the computation of accelerations based on spherical harmonics representation of the
+    !! gravitational potential of the central body. It uses the SHTOOLS library https://shtools.github.io/SHTOOLS/
+    use swiftest
+    implicit none
+    public
+
+end module shgrav
+ 
\ No newline at end of file