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Picture of meteoroid9/4/2023 ![]() (1987b) ‘The true height distribution and flux of radar meteors’, Puhl. (1987a) ‘The height distribution of radar meteors: Observations at 2 MHz’, J. (1988b) ‘The inner Oort Cloud and the source of comet Halley’, Mon. (1988a) ‘Identification of Meteoroid Streams from Apollo Asteroids in the Adelaide Radar Orbit Surveys’, Icarus 75, 64–96. (1987) ‘Asteroid 5025 P-L, comet 1967 II Rudnicki, and the Taurid meteoroid complex’, The Observatory 107, 157–160. (1986) ‘The origin of the sporadic meteoroid component’, Mon. A.U., Minor Planet Center, Cambridge, Mass. ( 1981, 1982) Radio Meteor Investigations in Obninsk: Catalogue of Orbits, Volumes 1 and 2, Soviet Geophysical Committee of the Academy of Sciences of the U.S.S.R., Materials of the World Data Center B, Moscow. McDonnell (ed.), Cosmic Dust, Wiley, Chichester, pp. (1975) ‘A quantitative model for the ablation of dustball meteors’, Mon. Dust released from P/Encke: distribution with respect to the zodiacal cloud’, Icarus 72, 582–592. (1985) ‘Collisional Balance of the Meteoritic Complex’, Icarus 62, 244–272. (1987) ‘Meteoroids from Comet Bennett 1970 II’, Astron. (1973) ‘The origin of short-period comets’, Astrophys. (1988) ‘The origin of short-period comets’, Astrophys. (1981) ‘A test of comet and meteor shower associations’, Icarus 45, 545–553.ĭuncan, M., Quinn, T. (1983) Physics of Meteoric Phenomena, Reidel, Dordrecht.ĭrummond, J.D. (1986) ‘The origin of comets’, Vistas Astron. This process is experimental and the keywords may be updated as the learning algorithm improves.īailey, M.E., Clube, S.V.M. These keywords were added by machine and not by the authors. Recent investigations of the terrestrial influx of small meteoroids (sizes l00 μm1 cm) are reviewed, and it is shown that (i) Previous radar measurements have underestimated the influx of these bodies by at least an order of magnitude (ii) The true height distribution of meteors in the atmosphere indicates a very low bulk density, in general of order 0.01–0.10 gm cm −3 (iii) Several Apollo asteroids have associated meteoroid streams, implying a genetic relationship and hence the possibility that these asteroids are in fact extinct or dormant cometary nuclei and (iv) Along with the other three retrograde intermediate-period comets, P/Halley most likely originated in the Kuiper Cloud of comets just beyond the planetary region, and not in the distant Oort Cloud as is usually assumed.
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