brandon-rhodes/python-skyfield — pull request #17 by hoylemd (2014-02-02 18:35:31+00:00)
Title: Keplerian orbits

Here's my initial pull requests for the keplerian orbit calculation module.

It's not as accurate as Horizons - it disagrees on my test case by about 4,000,000 km - but it's a good start.

It also needs better integration with the current positionlib module - I couldn't figure out how to use the existing ICRS class, so I just used my older one.