Problem with different epochs

[anhiga]

If you plot orbits with different epochs, only the last epoch is showed in the title:

In [1]: from poliastro.neos import dastcom5
In [2]: from poliastro.plotting import OrbitPlotter
In [3]: eros = dastcom5.orbit_from_name('eros')[0]
In [4]: apophis = dastcom5.orbit_from_name('apophis')[0]
In [5]: eros.epoch
Out[5]: <Time object: scale='utc' format='jd' value=2451960.5>
In [6]: apophis.epoch
Out[6]: <Time object: scale='utc' format='jd' value=2454441.5>
In [7]: frame = OrbitPlotter()
In [8]: frame.plot(eros, label='eros')
In [9]: frame.plot(apophis, label='apophis')

I think you should be able to choose the epoch. Maybe we should use Orbit.propagate function.

[astrojuanlu]

After discussion in the wiki (see https://github.com/poliastro/poliastro/wiki/Plotting-multiple-orbits:-use-cases) I'm labeling this as a bug.

[astrojuanlu]

I will give you the honor of submitting a plot showcasing the solution and closing this issue @anhiga :)

[anhiga]

This is how plots look now.

from poliastro.examples import iss, molniya
from poliastro.plotting import OrbitPlotter

frame = OrbitPlotter()
frame.plot(iss, label='iss')
frame.plot(molniya, label='Molniya')

[astrojuanlu]

Using %matplotlib notebook and some patience one can arrive to something like this:

While I admit it is not optimal (notice the white space above the plot, apart from the manual tweaking) this fixes the original issue. Interested readers might want to check out #214, #226, #230 and matplotlib/matplotlib#9155.