galpy.orbit.Orbit.ll¶
-
Orbit.
ll
(*args, **kwargs)[source]¶ NAME:
llPURPOSE:
return Galactic longitudeINPUT:
t - (optional) time at which to get ll
- obs=[X,Y,Z] - (optional) position of observer (in kpc)
- (default=Object-wide default) OR Orbit object that corresponds to the orbit of the observer Y is ignored and always assumed to be zero
ro= distance in kpc corresponding to R=1. (default=Object-wide default)
OUTPUT:
l(t) [*input_shape,nt]HISTORY:
2019-02-21 - Written - Bovy (UofT)