Index: /trunk/Ohana/src/relastro/src/UpdateObjects.c
===================================================================
--- /trunk/Ohana/src/relastro/src/UpdateObjects.c	(revision 17151)
+++ /trunk/Ohana/src/relastro/src/UpdateObjects.c	(revision 17152)
@@ -115,4 +115,9 @@
       }
 
+      // if we have too few good detections for the desired fit, or too limited a baseline, use a
+      // fit with fewer parameters.  XXX if we have too few parameters for even the average
+      // position, consider including the lower-quality detections
+
+      // XXX add the parallax factor range as a criterion as well
       if ((Tmax - Tmin) < PM_DT_MIN) mode = FIT_AVERAGE;
       if ((mode == FIT_PM_ONLY) && (N < PM_TOOFEW)) mode = FIT_AVERAGE;