MSFC Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters

Details MSFC Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters MSFC Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004em%26p...95..141m&link_type=abstract

Earth, Moon, and Planets, Volume 95, Issue 1-4, pp. 141-153

Statistics

Computation

1

Comet, Comet Ejection, Leonids, Meteor, Meteor Shower, Meteoroids, Model Predictions, Numerical Integration, Perseids

Scientific paper

The cometary meteoroid ejection model of Jones and Brown [ Physics, Chemistry, and Dynamics of Interplanetary Dust, ASP Conference Series 104 (1996b) 137] was used to simulate ejection from comets 55P/Tempel-Tuttle during the last 12 revolutions, and the last 9 apparitions of 109P/Swift-Tuttle. Using cometary ephemerides generated by the Jet Propulsion Laboratory’s (JPL) HORIZONS Solar System Data and Ephemeris Computation Service, two independent ejection schemes were simulated. In the first case, ejection was simulated in 1 h time steps along the comet’s orbit while it was within 2.5 AU of the Sun. In the second case, ejection was simulated to occur at the hour the comet reached perihelion. A 4th order variable step-size Runge Kutta integrator was then used to integrate meteoroid position and velocity forward in time, accounting for the effects of radiation pressure, Poynting Robertson drag, and the gravitational forces of the planets, which were computed using JPL’s DE406 planetary ephemerides. An impact parameter (IP) was computed for each particle approaching the Earth to create a flux profile, and the results compared to observations of the 1998 and 1999 Leonid showers, and the 1993 and 2004 Perseids.

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