@testset "Laguerre-Conway" begin
  for T in rand(3600*1.5:3600*4, (5))
    start = oe_to_xyz([ (μs["Earth"]*(T/(2π))^2)^(1/3), 0.1, 0.1, 0., 0., 1. ], μs["Earth"])
    orbit = start
    for _ in 1:5
      i = 0.
      while i < T
        orbit = laguerre_conway(orbit, μs["Earth"], 1.)
        i += 1
      end
      @test i ≈ T
      @test orbit ≈ start
    end
  end
end