old_contents: def keplerian(time, p, k, ecc, omega, t0, vsys):
  	from .get_rvN import get_rvn
  	from numpy import zeros_like
  
  	vel = zeros_like(time)
  	get_rvn(time, p, k, ecc, omega, t0, vsys, vel)
  	return vel
new_contents: def keplerian(time, p, k, ecc, omega, t0, vsys):
  	from get_rvN import get_rvn
  	from numpy import zeros_like
  
  	vel = zeros_like(time)
  	get_rvn(time, p, k, ecc, omega, t0, vsys, vel)
  	return vel
subject: allow keplerian to be used outside of OPEN