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Msfc stream model preliminary results: modeling recent leonid and perseid encounters
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cooke, William J. Moser, Danielle E. |
| Copyright Year | 2004 |
| 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. |
| File Size | 1297032 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050061069 |
| Archival Resource Key | ark:/13960/t9576cr0x |
| Language | English |
| Publisher Date | 2004-10-15 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Comets Radiation Effects Time Dependence Numerical Integration Gravitational Fields Meteoroid Showers Leonid Meteoroids Ejection Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
