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New Evidence for Interplanetary Boulders?

Published online by Cambridge University Press:  12 April 2016

Zdenek Sekanina
Zdenek Sekanina*
Affiliation:
Smithsonian Astrophysical ObservatoryCambridge, Massachusetts

Abstract

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The present paper critically discusses the method of detection, the magnitude and the rate of occurrence of sudden disturbances in the motions of some short-period comets. The disturbances have recently been suggested as potential indicators of collisions between the comets and interplanetary boulders—minor objects whose existence was predicted by M. Harwit in 1967. The character of explosive phenomena, caused by an impact of such a boulder on a comet’s nuclear surface, depends significantly on the surface texture of the target body. To advance our understanding of the impact mechanism, a method is suggested which would supply a good deal of the missing information about the structure and optical properties of nuclear surfaces from precise photometric observations of cometary nuclei at large solar distances.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 13: Evolutionary and Physical Properties of Meteoroids , June 1971 , pp. 199 - 208
Copyright
Copyright © NASA 1971

References

Gehrels, T., Roemer, E., Taylor, R. C., and Zellner, B. H., 1970. Minor planets and related objects. IV. Asteroid (1566) Icarus, Astron. J., 75, 186–195.Google Scholar
Harwit, M., 1967. The cloud of interplanetary boulders, in The Zodiacal Light and the Interplanetary Medium, edited by Weinberg, J. L., NASA SP-150, Supt. of Documents, U.S. Govt. Printing Office, Washington, 307–313.Google Scholar
Marsden, B. G., 1969. Comets and nongravitational forces II, Astron. J., 74, 720–734.Google Scholar
Marsden, B. G., 1970. Comets and nongravitational forces III, Astron. J., 75, 75–84.Google Scholar
Marsden, B. G., 1971. The motion, splitting and present condition of Biela’s comet, Bull. American Astron. Soc, 3, 269.Google Scholar
Marsden, B. G., and Sekanina, Z., 1971. Comets and nongravitational forces IV, Astron. J., 76, 1135–1151.Google Scholar
Rakos, K. D., 1960. Light variations of the fast moving minor planet discovered on October 22, 1960, by Giclas, H. L., Lowell Osb. Bull., 5, 28–29.Google Scholar
Roemer, E., 1965. Observations of comets and minor planets, Astron. J., 70, 397–402.Google Scholar
Roemer, E., 1967. Comet notes, Publ. Astron. Soc. Pacific, 79, 272-273, 372-374, 503-505, 632–634.Google Scholar
Roemer, E., 1968. Comet notes, Publ. Astron. Soc. Pacific, 80, 106-108, 345–347.Google Scholar
Roemer, E., and Lloyd, R. E., 1966. Observations of comets, minor planets, and satellites, Astron. J., 71, 443–457.Google Scholar
Roemer, E., Thomas, M., and Lloyd, R. E., 1966. Observations of comets, minor planets, and Jupiter VIII, Astron. J., 71, 592–601.Google Scholar
Sekanina, Z., 1968. Motion, splitting and photometry of Comet Wirtanen 1957 VI, Bull. Astron. Inst. Czech., 19, 153–170.Google Scholar
Sekanina, Z., 1971. A core-mantle model for cometary nuclei and asteroids of possible cometary origin, in Physical Studies of Minor Planets, edited by Gehrels, T., NASA SP-267, Supt. of Documents, U.S. Govt. Printing Office, Washington, 423–428.Google Scholar
Veverka, J. F., 1970. Photometric and polarimetric studies of minor planets and satellites, PhD. dissertation, Harvard Univ., 97–107.Google Scholar
Yeomans, D. K., 1972. Nongravitational forces in comet Giacobini-Zinner, in The Motion, Evaluation of Orbits and Origins of Comets, edited by Chebotarev, G. A., Kazimirchak-Polonskaya, E. I. and Marsden, B. G., D. Reidel Publ. Co., Dordrecht, Holland, 181–186.Google Scholar