Two video spectra of a meteoric afterglow were obtained for the first time
during the 1999 Leonid aircraft campaign. The train was produced by a -13 m
agnitude Leonid fireball at a relatively low height between 91-75 km. The m
eteor spectrum has a strong hydrogen emission, proportional to 10-20 II ato
ms per one Fe atom The train spectrum consisted of a red continuum, yellow
continuum, and about 50 atomic lines between 3700-9000 Angstrom. The yellow
continuum, possibly due to NO2, was also detected in the persistent train.
The red continuum is interpreted as a thermal radiation of dust from meteo
ric debris at about 1400 K. Evidence for secondary ablation is found in the
afterglow. The atomic lines decayed within seconds of the meteor. The line
s of Fe I, Mg I, Na I, Ca I, Ca II, Cr I, Mn I, K I, and possibly Al I were
present in the glow together with the 5577 Angstrom forbidden O I line. Th
e gas temperature in the train was close to 5000 K at the beginning and dec
ayed to 1200 K within two seconds. However, thermal equilibrium was not sat
isfied for all populated levels.