def PhenomPL2PN(v, eta):
    """PhenomPL2PN(v, eta)
    v = orbital velocity : Cubic root of (Pi * Frequency (geometric))
    eta = symmetric mass-ratio

    Simple 2PN version of the orbital angular momentum L,
    without any spin terms expressed as a function of v.
    For IMRPhenomP(v2).

    Reference:
    - Boh&eacute; et al, 1212.5520v2 Eq 4.7 first line
    """
    return eta / v * (1.0 + (3.0 / 2.0 + eta / 6.0) * v ** 2.0 + (3.373 - 
        19.0 * eta / 8.0 - eta ** 2.0 / 24.0) * v ** 4.0)
