diff --git a/Assembly-CSharp.xml b/Assembly-CSharp.xml
index f0567ff..10d48b2 100644
--- a/Assembly-CSharp.xml
+++ b/Assembly-CSharp.xml
@@ -657,7 +657,7 @@
         <member name="F:CelestialBody.gravParameter">
             <summary>
             The gravitational parameter GM is the universal gravitational constant G times the mass M of the body. 
-            In KSP the gravitational constant G is exactly 6.673 m^3 / (kg s^2), and the body mass is measured in
+            In KSP the gravitational constant G is exactly 6.67408 * 10^-11 m^3 / (kg s^2), and the body mass is measured in
             kilograms.
             </summary>
         </member>
@@ -6122,3 +6122,4 @@
         </member>
     </members>
 </doc>
+
diff --git a/src/CelestialBody.cs b/src/CelestialBody.cs
index b5d584b..b37c2af 100644
--- a/src/CelestialBody.cs
+++ b/src/CelestialBody.cs
@@ -58,7 +58,7 @@ public class CelestialBody /*: MonoBehaviour, ITargetable, IDiscoverable*/
     public double gMagnitudeAtCenter;
     /// <summary>
     /// The gravitational parameter GM is the universal gravitational constant G times the mass M of the body. 
-    /// In KSP the gravitational constant G is exactly 6.673 m^3 / (kg s^2), and the body mass is measured in
+    /// In KSP the gravitational constant G is exactly 6.67408 * 10^-11 m^3 / (kg s^2), and the body mass is measured in
     /// kilograms.
     /// </summary>
     public double gravParameter;