def _parse_spectre_coefficients (hist_line):
    """ parse the coefficients from the spectre line
    
    Parameters
    ----------
    hist_line : string
        "HISTORY 23: 7:2008 D1,2,3: 5.50348825884E+03 4.46070136915E-02 0.00000000000E+00"
    
    Returns
    -------
    coefficients : list
        [5.50348825884e+03, 4.46070136915e-02, 0.0e+00]
        
    """
    coeffs = hist_line[18:36],hist_line[36:54],hist_line[54:]
    coeffs = [float(c.replace("D","e")) for c in coeffs]
    return coeffs