diff --git a/source/MulensModel/trajectory.py b/source/MulensModel/trajectory.py
index ef316b22..cfa629c7 100644
--- a/source/MulensModel/trajectory.py
+++ b/source/MulensModel/trajectory.py
@@ -220,12 +220,11 @@ def _calculate_delta_N_E(self):
             raise NotImplementedError(
                 "The topocentric parallax effect not implemented yet")
 
-    def _project_delta(self, delta=None):
+    def _project_delta(self):
         """
         Project N and E parallax offset vector onto the tau, beta plane.
         """
-        if delta is None:
-            delta = self.parallax_delta_N_E
+        delta = self.parallax_delta_N_E
 
         delta_tau = (delta['N'] * self.parameters.pi_E_N +
                      delta['E'] * self.parameters.pi_E_E)
@@ -233,13 +232,6 @@ def _project_delta(self, delta=None):
                       delta['E'] * self.parameters.pi_E_N)
         return [delta_tau, delta_beta]
 
-    def _annual_parallax_trajectory(self):
-        """calculate annual parallax component of trajectory"""
-
-        # Calculate the parallax offsets
-        delta_annual = self._get_delta_annual()
-        return self._project_delta(delta_annual)
-
     def _get_delta_annual(self):
         """
         calculates projected Earth positions required by annual parallax
@@ -284,11 +276,6 @@ def _get_delta_annual(self):
         Trajectory._get_delta_annual_last = out
         return out
 
-    def _satellite_parallax_trajectory(self):
-        """calculate satellite parallax component of trajectory"""
-        delta_satellite = self._get_delta_satellite()
-        return self._project_delta(delta_satellite)
-
     def _get_delta_satellite(self):
         """
         calculates differences of Earth and satellite positions