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  • ASTRONOMY  (2)
  • 1985-1989  (2)
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  • 1
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    Unknown
    IRAS observations of extended zodiacal structures (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: In 1983, the Infrared Astronomical Satellite discovered two pairs of dust bands, straddling the ecliptic plane and located in the asteroid belt. New analysis of the IRAS data has resulted in the detection of as many as eight additional bands, spread over more than 40 deg of ecliptic latitude. Dust band morphology is found to vary between different band pairs, having a typical apparent width of a few degrees. This limits the total number of bands which can be distinguished to near the number observed. The Tempel 2 and Encke dust trails are observed to extend over much more of their orbits than had been previously reported, and a new type of dust trail is found which has a relatively large angular width and no imbedded cometary source.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 334; L55-L58
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Dust bands in the asteroid belt (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper describes the original IRAS observations leading to the discovery of the three dust bands in the asteroid belt and the analysis of data. Special attention is given to an analytical model of the dust band torus and to theories concerning the origin of the dust bands, with special attention given to the collisional equilibrium (asteroid family), the nonequilibrium (random collision), and the comet hypotheses of dust-band origin. It is noted that neither the equilibrium nor nonequilibrium models, as currently formulated, present a complete picture of the IRAS dust-band observations.
    Keywords: ASTRONOMY
    Type: Asteroids II; Mar 08, 1988 - Mar 11, 1988; Tucson, AZ; United States
    Format: text
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    NASA TECHNICAL REPORTS
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