Abstract <p>Molecular oxygen is an important gas both in the Earth’s atmosphere and in the atmospheres of Mars and Venus. To determine its content the highly accurate absorption line parameter values are required. For this purpose, oxygen O₂ absorption spectra were measured in the 7800–7990 cm⁻¹ range using a Bruker IFS 125HR Fourier spectrometer with a spectral resolution of 0.01 cm⁻¹ and an optical path length of 2880 cm at a room temperature and five values of O₂ pressure. The intensities, broadening and shift coefficients, and parameters characterizing the dependence of broadening on the velocity of colliding molecules were determined for 55 self-broadened O₂ absorption lines. A good agreement between our intensity values and high-precision measurements by other authors is shown. The self-shift coefficients are obtained for the first time.</p>