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  • 1
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    The Steward Observatory asteroid relational database (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The Steward Observatory Asteroid Relational Database (SOARD) was created as a flexible tool for undertaking studies of asteroid populations and sub-populations, to probe the biases intrinsic to asteroid databases, to ascertain the completeness of data pertaining to specific problems, to aid in the development of observational programs, and to develop pedagogical materials. To date, SOARD has compiled an extensive list of data available on asteroids and made it accessible through a single menu-driven database program. Users may obtain tailored lists of asteroid properties for any subset of asteroids or output files which are suitable for plotting spectral data on individual asteroids. The program has online help as well as user and programmer documentation manuals. The SOARD already has provided data to fulfill requests by members of the astronomical community. The SOARD continues to grow as data is added to the database and new features are added to the program.
    Keywords: ASTRONOMY
    Type: NASA Space Engineering Research Center for Utilization of Local Planetary Resources; 8 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    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
  • 3
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    Zodiacal dust bands - Their relation to asteroid families (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The zodiacal dust band phenomenon is presently reproduced by a mathematical model of orbitally evolved collisional debris spatial distributions whose torus exhibits particle-density maxima at heliocentric latitudes near its constituent particles' mean proper orbital inclinations, as well as near the loci of the particle orbits' perihelia and aphelia. Models of dust toruses for seven asteroid families are generated and compared with observations of the principal dust bands. Nonequilibrium models of dust band production and evolution furnish a framework within which all dust band observations can be understood.
    Keywords: ASTRONOMY
    Type: Icarus (ISSN 0019-1035); 85; 267-289
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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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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