[en] The reactions of interest in nuclear astrophysics mostly have very small cross-sections over the Gamow energy range. Reported in this work are Large Basis Shell Model calculations of low lying energy levels, level lifetimes, proton spectroscopic factors of ¹⁵O nucleus up to the resonance state at 7.556 MeV and results of the calculation are compared with the existing experimental data. The spectroscopic factors and level lifetimes are reproduced well using shell model calculations. However, there are also some disagreements which indicates need of expansion of the model space. The possibilities of improvement of the results will be discussed in detail