diff --git a/src/structure/structure.ts b/src/structure/structure.ts
index 88a4aa89487c03d80e98525b474b15bd4ab8196a..d222bef99dde983a007e2b2b5a78ca90f00b5947 100644
--- a/src/structure/structure.ts
+++ b/src/structure/structure.ts
@@ -342,4 +342,7 @@ export abstract class Structure extends ChildNub {
         };
     }
 
+    public getFirstAnalyticalParameter() {
+        return this.prms.Q;
+    }
 }