Aerodynamic heating of the Grant meteorite

Maringer, R. E.; Manning, G.K.

doi:10.1016/0016-7037(60)90083-1

Cited by 12 publications

(2 citation statements)

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“…Observations of concentrations of cosmogenically produced nuclides can be accounted for surprisingly well in terms of the model despite the rather strongly simplifying assumptions used. However, the application of this model yields an extraor dinarily large loss of meteoritic matter during its flight through the earth's atmosphere (354,355). It is hoped that by improving the model (384) it will be possible to decrease the existing discrepancies.…”

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confidence: 97%

High-Sensitivity Mass Spectroscopy in Nuclear Studies

Hintenberger¹

1962

Annu. Rev. Nucl. Sci.

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confidence: 97%

High-Sensitivity Mass Spectroscopy in Nuclear Studies

Hintenberger¹

1962

Annu. Rev. Nucl. Sci.

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“…It is well known that fusion crusts of iron meteorites are in general broader than those of stony meteorites because of the high heat conductivity of the metal phase compared with that of the silicates (Maringer and Manning, 1960). Ramdohr (1965) made a detailed study on this subject.…”

Section: Introductionmentioning

confidence: 99%

Meteor orbits and dust; the proceedings of a symposium

Hawkins¹

1967

Smithsonian Contributions to Astrophysics

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The Proceedings of the Symposium on Meteor Orbit* and Dust is published simultaneously as a NASA Special Publication (SP-135) and as Volume 11 of the Smithsonian Contributions to Astrophysics. This single publication thus serves in a dual capacity to satisfy the requirements of both agencies for the published record of this international meeting.The NASA Special Publications series, begun in 1962, makes available information derived from or of value to NASA activities, and includes such publications as conference proceedings, monographs, data compilations, handbooks, Bourcebooks, and special bibliographies.The IntroductionWe recently completed a general analysis of the atmospheric trajectories of 413 precisely reduced Super-Schmidt photographic meteors (Jacchia, Verniani, and Briggs, 1965). We studied the dependence of heights, lengths, decelerations, and magnitudes on such basic parameters as velocity, angle of incidence, and mass, as well as on derived parameters such as the ablation coefficient and the fragmentation index; the latter were in turn related to the other geometrical and physical characteristics, including the phenomena of wake and terminal blending. The results of the analysis are mainly concerned with physical characteristics of meteors; in this paper we shall limit ourselves to only a few points related to problems of orbits and distribution, namely, physical differences dependent on the type of orbit, peculiarities of individual showers, and the mass scale for photographic meteors.Systematic differences between groups of meteors Systematic differences in some physical characteristics between meteors in short-period and long-period orbits were first pointed out by Jacchia (1958Jacchia ( , 1963. He found that the beginning heights of meteors with aphelion distances greater than 7 a.u. were higher than the corresponding heights of meteors with aphelion distances smaller than 7 a.u. All meteors were, of course, reduced to the same brightness.• Smithsonian Astrophysical Observatory and Harvard College Observatory, Cambridge, Massachusetts.'Smithsonian Astrophysical Observatory and Harvard College Observatory; on leave from Centra Nationals per la Fisica dell'Atmosfera c la Meteorologia del C.N.R., Rome, Italy. * Smithsonian Astrophysical Observatory, Cambridge, Massachusetts.The present general analysis has confirmed the effect found by Jacchia: meteors with aphelion distance smaller than 6 a.u. appear 1.8 km lower than meteors in long-period orbits, reduced to the same velocity, mass, and zenith angle. The maximum light and end heights are correspondingly lower ( fig. 1). This effect is related to the different densities that we find for the two groups: on the average, meteors in short-period orbits appear to be about 1.4 times as dense as meteors in long-period orbits. In addition, for short-period meteors, the density increases as the aphelion distance decreases ( fig. 2). These systematic differences in density could be ascribed to the different conditions in which the meteoroids were formed ...

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Meteoritenalter und verwandte Probleme der Kosmochemie

Wänke

Kosmochemie

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Aerodynamic heating of the Grant meteorite

Cited by 12 publications

References 2 publications

High-Sensitivity Mass Spectroscopy in Nuclear Studies

High-Sensitivity Mass Spectroscopy in Nuclear Studies

Meteor orbits and dust; the proceedings of a symposium

Meteoritenalter und verwandte Probleme der Kosmochemie

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