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Propagation is inconsistent sometimes

See original GitHub issue

For example:

op = StaticOrbitPlotter()

op.plot(
    Orbit.from_vectors(
        Sun,
        [0.36137779, 0.84843643, 0.36772403] * u.au,
        [-0.01849308, -0.00788258, -0.00339819] * u.au / u.day,
    ),
    trail=True,
)

trail

Issue Analytics

State:
Created 3 years ago
Comments:8 (8 by maintainers)

Top GitHub Comments

1reaction

Meugecommented, Apr 20, 2020

It seems the problem comes from the propagate method as there is a discrepancy in the position values. As you may notice from the example below:

from poliastro.bodies import Earth
from poliastro.twobody import Orbit
from poliastro.twobody.propagation import propagate

position = [-6045, -3490, 2500] * u.km
velocity = [-3.457, 6.618, 2.533] * u.km / u.s

ss = Orbit.from_vectors(Earth, position, velocity)

coordinates = propagate(ss,ss.epoch.reshape(1))
print(coordinates)
print(ss.rv()[0]) #The one define in position

Output

 
[(-7010.52954739, 1276.67143012, 3581.24784291)] km
[-6045. -3490.  2500.] km

0reactions

astrojuanlucommented, Apr 22, 2020

Original figure after merging #926:

trail

✔️

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