diff --git a/src/orbits.cpp b/src/orbits.cpp
index d393e52..489125f 100644
--- a/src/orbits.cpp
+++ b/src/orbits.cpp
@@ -40,6 +40,8 @@ ellipseInitAB(double a, double b)
 	return ep;
 }
 
+// FIXME: we should avoid calling ellipseInitAB, and recalculate the properties
+//	to avoid floating point errors in the known quantity 'e'
 EllipseParameters
 ellipseInitAE(double a, double e)
 {