The absorption spectrum of the HD16O molecule in the 1.4 mcm region [R. Toth, J. Mol. Spectrosc. 186, 66-89 (1997)] is theoretically analyzed. The rotational and centrifugal distortion constants for the (002) vibrational state and the parameters of the effective dipole moment for the 2n3 band are determined with the use of the least-squares method. The parameters obtained allow high-accuracy calculation of spectral line centers and intensities to be made. Comparison of the calculated results with the experimental data shows that in some cases the intensities have been measured with the errors that significantly exceed the declared ones. The calculations are based on the use of the Pade-Borel approximations and the method of effective dipole moment. It is proved that the rovibrational energy levels of the (002) vibrational state can be well described up to J < 10 with the model of an isolated state.