Index: /branches/eam_branches/ipp-pstamp-20260421/psModules/src/astrom/pmAstrometryObjects.c
===================================================================
--- /branches/eam_branches/ipp-pstamp-20260421/psModules/src/astrom/pmAstrometryObjects.c	(revision 43124)
+++ /branches/eam_branches/ipp-pstamp-20260421/psModules/src/astrom/pmAstrometryObjects.c	(revision 43125)
@@ -1017,5 +1017,5 @@
             DX[iY][iX] += dX*Npts;
             DY[iY][iX] += dY*Npts;
-            D2[iY][iX] += PS_SQR(dX*Npts) + PS_SQR(dY*Npts);
+            D2[iY][iX] += Npts*(PS_SQR(dX) + PS_SQR(dY));
         }
     }