diff --git a/tests/orbit_test.cpp b/tests/orbit_test.cpp
index 576a6b5..acd12fd 100644
--- a/tests/orbit_test.cpp
+++ b/tests/orbit_test.cpp
@@ -60,8 +60,8 @@ TEST_CASE("orbit propagation", "[orbits]")
 // NOTE: example 2.5 - c
 TEST_CASE("orbital period", "[orbits]")
 {
-	double a = 24371;		// NOTE: semi-major axis in km
-	double mu = 398601.68;	// NOTE: gravitational parameter
+	double a = 24371;		// semi-major axis in km
+	double mu = 398601.68;	// gravitational parameter
 
 	double T = orbitGetPeriod(a, mu);
 	REQUIRE_THAT(T, WithinAbs(37863.5, 50e-3));