ИСТИНА

Benešov spectrum is probably the richest meteor spectrum ever obtained. Molecules can provide clues about physical conditions during ablation. We compared observations with theoretical calculations. FeO, CaO, AlO, MgO and probably also N2 bands were detected. CaO/FeO ratio strongly increased toward lower altitudes, while AlO/FeO did not. It can be explained if temperature in the wake was about 3500 K. MgO bands were fainter than AlO bands contrary to expectations. Vibrational (3000 K) and rotational (1000 K) temperatures of AlO were different. AlO non-equilibrium can be explained by short hydrodynamic timescales. CN was not detected confirming low abundance of carbon in the meteoroid.