def epb(mjd):
    """
    Converts Modified Julian Date to Besselian Epoch

    Inputs:
    - mjd   Modified Julian Date (JD - 2400000.5)

    Returns the Besselian Epoch.

    Reference:
    Lieske,J.H., 1979. Astron.Astrophys.,73,282.

    History:
    P.T.Wallace Starlink    February 1984
    2002-07-11 ROwen  Converted EPB2D to Python.
    """
    return 1900.0 + (mjd-15019.81352)/365.242198781