Video and photographic spectroscopy of 1998 and 2001 Leonid persistent trains from 300 to 930 nm

Spectra of persistent meteor trains were observed at wavelength between 300 and 930 nm. Two obtained train spectra during the 1998 and 2001 Leonid meteor showers are reported here. During the 1998 Leonids, one train was detected by a photographic camera with a spectrograph covering 370 - 640 nm region. On the other hand, during the 2001 Leonids, video observations were carried out using image intensified cameras in ultraviolet (UV), visible and near infrared (near-IR) wavelengths. Temperatures in persistent trains have been measured by atmospheric O-2 A( 0,1) band at the wavelength near 864.5 nm. From a video spectrum obtained just 7 s after parent. reball's. are, a rotational temperature of 250 K at altitude of 88.0 +/- 0.5 km was estimated. We can say that the cooling time scale of train strongly depends on the initial mass of its. reball at least for Leonids. Based on cooling constant calculated from our results, we estimated a temperature of similar to 130 K as a final exothermic temperature at early stage of persistent trains.