Finding current angle between earth and other planet

Its been a while since i used skyfield, earlier i tried to get oppositions and conjunctions using the link https://rhodesmill.org/skyfield/almanac.html#opposition-and-conjunction, is there a way to find the current angle between 2 planets or even better would be to get results for custom angles along with opposition and conjunction which is usually 0 or 180.

[ghost]

I might be misunderstanding here completely, but I think this might be a request for a generic geometric event finder like CSPICE has:

https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/gfevnt_c.html

described as “Determine time intervals when a specified geometric quantity satisfies a specified mathematical condition.”

My guess is there are other Python libraries to solve this problem and that you might even be using them to implement some of Skyfield’s other functions.

Not sure if you want to add a “here’s how to ‘goalseek’ with skyfield” section to the documentation and/or implement a skyfield-specific version of a generic Python goalseek function

[brandon-rhodes]

That sounds like a good idea! Feel free to post further comments here, either with or without re-opening the issue, and I can answer questions about the behavior of your code once you’ve put some together. Good luck!