phi change

lib/objects.py

@@ -186,6 +186,7 @@ class System(Body):
     def eccCOM(self): #exentricity of two body sub system
         if len(self.bodylist) == 2 :
             ecc = (2.*self.ECOM*(np.linalg.norm(self.LCOM)**2))/(Ga**2*self.M**2*self.mu**3) + 1.
+
         else :
             ecc = np.nan
         return ecc
@@ -215,13 +216,15 @@ class System(Body):
         return sma
 
     @property
-    def phi(self): #return angle in degree between plans formed by body1 and body2 (perurbator) trajectories
+    def phi(self): #return angle in degree between plans formed by perturbator plan and reference plan
         if len(self.bodylist) == 3 :
             body1 = self.bodylist[0]
             body2 = self.bodylist[2]
-            n1 = np.cross(body1.q, body1.v)
-            n2 = np.cross(body2.q, body2.v)
+            n1 = np.cross(body1.q-self.COM, body1.v-self.COMV)
+            n2 = np.cross(body2.q-self.COM, body2.v-self.COMV)
+            n1 = np.array([0., 0., 1.], dtype=np.longdouble)
             phi = np.arccos(np.dot(n1, n2) / (np.linalg.norm(n1) * np.linalg.norm(n2)))*180./np.pi
         else :
             phi = np.nan
-        return phi
+        return phi
+

main.py

@@ -12,7 +12,7 @@ from lib.units import *
 def main():
     #initialisation
     m = np.array([1., 1., 1e-1],dtype=np.longdouble)*Ms#/Ms  # Masses in Solar mass
-    a = np.array([1., 1., 5.5],dtype=np.longdouble)*au#/au   # Semi-major axis in astronomical units
+    a = np.array([.75, .75, 5.],dtype=np.longdouble)*au#/au   # Semi-major axis in astronomical units
     e = np.array([0., 0., 0.25],dtype=np.longdouble)   # Eccentricity
     psi = np.array([0., 0., 80.],dtype=np.longdouble)*np.pi/180.    # Inclination of the orbital plane in degrees
 
@@ -27,7 +27,7 @@ def main():
     v = np.array([v1, v2, v3],dtype=np.longdouble)
 
     #integration parameters
-    duration, step = 5000*yr, np.longdouble(1./2.*86400.) #integration time and step in seconds
+    duration, step = 1000*yr, np.longdouble(1./2.*86400.) #integration time and step in seconds
     integrator = "leapfrog"
     n_bodies = 3
     display = False