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  • ASTRONOMY  (2)
  • Engineering General
  • nucleotide sequence
  • 1980-1984  (2)
  • 1984  (2)
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  • 1980-1984  (2)
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  • 1
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    Observations of comet IRAS-Araki-Alcock 1983d (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Observations of comet IRAS-Araki-Alcock 1983d in the infrared region from 12 to 100 microns are reported. The dominant feature seen in the infrared is an extensive dust tail not reported in visual observations. A dust production rate of 200 kg/s is deduced. The far-infrared spectrum suggests that the radius of a mean grain decreases from 30 to 5 microns along the tail.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 278; L11-L14
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    The IRAS fast-moving object search (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The IR Astronomy Satellite (IRAS) mission has yielded an all-sky IR survey with a detailed pointing history. An analysis is being conducted which will allow an estimate to be made of the detectable population of comets and Apollo asteroids. On the basis of results obtained to date, it is expected that IRAS will detect comets having visual magnitudes lower than 17 if their motions are greater than about 1 arcmin/hour. The positional accuracy of such detections depends on the number of bands in which an object was observed, although the accuracy has so far proved unsuitable for orbit determination. There is no evidence of an undiscovered main belt asteroid population at high ecliptic latitudes.
    Keywords: ASTRONOMY
    Type: Nature (ISSN 0028-0836); 309; 315-319
    Format: text
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    NASA TECHNICAL REPORTS
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