Video observations of Leonids 1999

Citation
S. Molau et al., Video observations of Leonids 1999, EARTH MOON, 87(1), 1999, pp. 1-10
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
EARTH MOON AND PLANETS
ISSN journal
0167-9295 → ACNP
Volume
87
Issue
1
Year of publication
1999
Pages
1 - 10
Database
ISI
SICI code
0167-9295(1999)87:1<1:VOOL1>2.0.ZU;2-X
Abstract
We analyse data obtained by different ground-based video camera systems dur ing the 1999 Leonid meteor storm. We observe similar activity profiles at n earby observing sites, but significant differences over distances in the or der of 4,000 km. The main peak occured at 02:03 UT (lambda. = 235.degrees 2 86, J2000, corrected for the time of the topocentric stream encounter). At the Iberian peninsula quasi-periodic activity fluctuations with a period of about 7 min were recorded. The camera in Jordan detected a broad plateau o f activity at 01:39-01:53 UT, but no periodic variations. The Leonid bright ness distribution derived from all cameras shows a lack of faint meteors wi th a turning point close to +3(m), which corresponds to meteoroids of appro ximately 10(-3) g. We find a pin-point radiant at alpha = 153.degrees 65 +/ -0.degrees1, delta = 21.80 +/- 0.degrees1 (lambda. = 235.degrees 290). The radiant position is identical before and after the storm, and also during t he storm no drift is observed.