Here's the plot of the data in data_s1.txt (spacecraft) and data_m.txt (Moon). There are proper state vectors for the spacecraft $[x, y, z, v_x, v_y, v_z]$ but only position vectors for the Moon. $[x, y, z]$. There is another problem as well, they don't align correctly!! The spacecraft does not orbit the Moon!! @@
I think there may be something screwy with the data. the error is much bigger than 1/81 so it's more than just barycenter versus Earth-center coordinates. Something's wrong. Anyway, here it is!
Python script:
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
with open('data_s1.txt', 'r') as infile:
slines = infile.readlines()
slines = [ [float(x) for x in line.strip().split(',')[1:]] for line in slines[1:-1]]
sstates = np.array(zip(*slines))
with open('data_m.txt', 'r') as infile:
mlines = infile.readlines()
mlines = [ [float(x) for x in line.strip().split(',')[1:]] for line in mlines[1:-1]]
mstates = np.array(zip(*mlines))
if True:
fig = plt.figure(figsize=[10, 8]) # [12, 10]
ax = fig.add_subplot(1, 1, 1, projection='3d')
x, y, z = sstates[:3]
ax.plot(x, y, z, '-r')
x, y, z = mstates[:3]
ax.plot(x, y, z, '-b')
ax.set_xlim(-405000, 405000)
ax.set_ylim(-405000, 405000)
ax.set_zlim(-405000, 405000)
plt.show()
