Physico-chemical properties of 109/Swift -Tuttle debris

Abstract

Dust ejecta of comet 109P/Swift- Tuttle produces one of the most relevant annual meteor showers: the Perseids (PER). This display of meteors is active between July 17 and August 24, peaking on August 12 [1]. As a result of good weather conditions that generally predominate in most of Spain during summer time, the video observing stations operated by the SPanish Meteor Network (SPMN) have registered a huge amount of multi-station meteor and fireballs events since they started operation in 2006. As a result of our continuous spectroscopic campaign, emission spectra of Perseids brighter than mag. -4/-5 have also been recorded. As an example, we present here a preliminary analysis of some relevant multi-station PER fireball events recorded during 2011 and 2012.