Atmospheric entry heating - A criterion to distinguish between asteroidal and cometary sources of interplanetary dust

Details Atmospheric entry heating - A criterion to distinguish between asteroidal and cometary sources of interplanetary dust Atmospheric entry heating - A criterion to distinguish between asteroidal and cometary sources of interplanetary dust

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...77..287f&link_type=abstract

Icarus (ISSN 0019-1035), vol. 77, Feb. 1989, pt. 1, p. 287-310.

Astronomy and Astrophysics

Astronomy

105

Aerodynamic Heating, Asteroids, Atmospheric Entry, Cometary Atmospheres, Infrared Astronomy Satellite, Interplanetary Dust, Cosmic Dust, Encke Comet, Halley'S Comet, Orbital Elements, Particle Size Distribution, Poynting-Robertson Effect, Earth, Atmosphere, Heating, Asteroid, Comets, Interplanetary Dust, Origin, Source, Samples, Extraterrestrial, Laboratory Studies, Particles, Exposure Age, Temperature, Orbits, Procedure, Diagrams, Calculations, Velocity, Size, Asteroid Belt, Solar Flare, Tracks, Parent Bod

Scientific paper

Interplanetary dust samples obtained in the earth stratosphere by NASA sampling aircraft have been analyzed to ascertain the duration of their exposure as small particles in space, and the peak temperature they attained during atmospheric entry and deceleration. A three-dimensional orbital evolution model is then developed from these data which involves asteroidal and cometary sources for the dust as well as the influence of Poynting-Robertson drag. Particles from comets with perihelia greater than 1.2 AU typically undergo 600-800 C heating, while those from comets with smaller perihelia are heated to temperatures in excess of 800 C. Atmospheric-entry velocities inferred are consistent with the major fraction of stratospheric cosmic dust being derived from parent bodies in the main asteroid belt.

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