0433647 - ASÚ 2015 RIV NL eng J - Journal Article
Rudawska, R. - Zender, J. - Jenniskens, P. - Vaubaillon, J. - Koten, Pavel - Margonis, A. - Toth, J. - McAuliffe, J. - Koschny, D.
Spectroscopic Observations of the 2011 Draconids Meteor Shower.
Earth, Moon, and Planets. Roč. 112, 1-4 (2014), s. 45-57. ISSN 0167-9295. E-ISSN 1573-0794
R&D Projects: GA ČR GA205/09/1302
Institutional support: RVO:67985815
Keywords : meteorites * meteors * meteoroids
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 0.667, year: 2014 ; AIS: 0.447, rok: 2014
DOI: https://doi.org/10.1007/s11038-014-9436-8

On October 8th, 2011, Earth was predicted to transverse the 1900 A.D. dust ejecta of the comet. In 1900, the comet's perihelion distance first moved significantly inwards to the Sun and ejection conditions could have been unusual. An airborne observing campaign was organized, with several teams contributing imaging and spectrographic cameras to study the manner in which these meteoroids released the volatile element sodium during the ablation process in the Earth's atmosphere. IMCCE, ESA, and the SETI Institute contributed spectrographic cameras based on low-light WATEC 902H2 Ultimate, low-light LCC1, and GenII XX1332 image intensified cameras. An outburst was observed, much as predicted. Despite a lack of bright meteors, a total of 15 Draconid spectra were recorded. All show evidence of an early release of sodium. The loss of sodium was observed to coincide with the formation of a distinct wake of fragments. The observations show that 21P/Giacobini-Zinner ejected fragile meteoroids during the return in 1900. Those grains may have lost some sodium even before impacting Earth.
Permanent Link: http://hdl.handle.net/11104/0237885