You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
`Ephem.from_horizons` returns equatorial coordinates in the ICRF reference frame, which has its origin at the Solar System barycenter. For `State` to correctly convert the ephemeris object to vectors, we need to set the Horizons observer to the Solar System barycenter (``"@ssb"``). However, dynamical integrations are done in a heliocentric reference frame, so we transform the result to ``"heliocentriceclipticiau76"``:
175
177
176
178
.. doctest-requires:: astroquery
179
+
.. doctest-remote-data::
177
180
178
181
>>> eph = Ephem.from_horizons(
179
182
... "48P",
@@ -496,6 +499,7 @@ The following example compares syndynes to a Spitzer Space Telesocpe image of co
496
499
The `sbpy` testing suite shows that arcsecond-level accuracy is possible, but this is generally not enough for direct comparison to typical images of comets, which need sub-arcsecond alignment. The accuracy of the coordinates object depends on the the comet and observer states, but also on whether or not light travel time is accounted for, and the accuracy of the orbit integrator.
0 commit comments