More than 250 rotationally resolved vibrational bands of the A 2B 2– X 2A 1 electronic transition of 15NO 2 have been observed in the 14 300–18 000 cm −1 range. The bands have been recorded in a recently constructed setup designed for high resolution spectroscopy of jet cooled molecules by combining time gated fluorescence spectroscopy and molecular beam techniques. The majority of the observed bands has been rotationally assigned and can be identified as transitions starting from the vibrational ground state or from vibrationally excited (hot band) states. An exceptionally strong band is located at 14 851 cm −1 and studied in more detail as a typical benchmark transition to monitor 15NO 2 in atmospheric remote sensing experiments. Standard rotational fit routines provide band origins, rotational and spin rotation constants. A subset of 177 vibronic levels of 2B 2 vibronic symmetry has been analyzed in the energy range between 14 300 and 17 250 cm −1, in terms of integrated density and using Next Neighbor Distribution. It is found that the overall statistical properties and polyad structure of 15NO 2 are comparable to those of 14NO 2 but that the internal structures of the polyads are completely different. This is a direct consequence of the X 2A 1– A 2B 2 vibronic mixing.