public KeplerianDateModel(
            DateTimeOffset referenceDate,
            KeplerianModel keplerianModel)
        {
            ReferenceDate = referenceDate;

            DaysDifference     = KeplerianHelper.GetDaysDifference(referenceDate);
            J2000CenturyFactor = KeplerianHelper.GetJ2000CenturyFactor(referenceDate);

            Values = keplerianModel.GetKeplerianValueModel(J2000CenturyFactor);
        }