def METHOD_NAME(mjd, tt2tdb):
    """
    Convert from mjd utc to et using tempo2 out put tt2tdb
    """
    mjdJ2000 = mp.mpf("51544.5")
    secDay = mp.mpf("86400.0")
    mjdTT = mjd2tdt(mjd)
    return (mjdTT - mjdJ2000) * secDay + mp.mpf(tt2tdb)