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

By Cooke, William J.

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Book Id: WPLBN0004306025
Format Type: PDF eBook :
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Reproduction Date: 2004-10-15

Title: Msfc Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters  
Author: Cooke, William J.
Volume:
Language: English
Subject: Solar Cells, Near Infrared Radiation, Electromagnetic Absorption
Collections: Government Library Collection, Government Library Collection
Historic
Publication Date:
2004
Publisher:

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E, M. D. (2004). Msfc Stream Model Preliminary Results: Modeling Recent Leonid and Perseid Encounters. Retrieved from http://nationalpubliclibrary.info/


Description
Description: The cometary meteoroid ejection model of Jones and Brown (1996b) 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 hour 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 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.; CASI; Nasa Publication Center: Marshall Space Flight Center; Unclassified; Copyright (Distribution as joint owner in the copyright) ; Unlimited; Publicly available


 

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