Influx of interplanetary bodies onto earth

Details Influx of interplanetary bodies onto earth Influx of interplanetary bodies onto earth

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..361c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 361-366.

Astronomy and Astrophysics

Astrophysics

57

Asteroids, Earth (Planet), Impact Loads, Interplanetary Space, Meteoroids, Ablation, Earth Atmosphere, Earth Surface

Scientific paper

Observational evidence is used together with a variety of methods to produce a single distribution curve of the numbers of interplanetary bodies arriving at earth in a year and valid for a mass range of 10 exp -21 - 10 exp 15 kg. A total of 1.7 x 10 exp 8 kg/yr is found for the entire earth's surface. The two most important mass ranges are 10 exp 12 - 10 exp 15 kg, consisting mostly of stony or carbonaceous bodies, and 10 exp 4 - 10 exp 7 kg, consisting mostly of small inactive comets. Meteorites with masses below 1 kg add only a few percent at most to the total mass influx. The almost unknown bodies in the 10 to 100 m size range are the second most important contributors to earth mass.

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