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  • 1
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    Astrolabe observations of Mars (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A previously reported bias in the right ascension residuals of astrolabe observations of Mars is removed by correcting for equinox motion and relating the observations to the Jet Propulsion Laboratory's planetary ephemeris, DE111. The remaining residuals show a 'phase effect', the magnitude of which is solved for and compared with that previously found for meridian transit observations. The final residuals reveal no significant offset in either right ascension or declination. In modifying the residuals, use is also made of Fricke's (1980) correction for the motion of the FK 4 equinox.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Astronomy and Astrophysics; 102; 3, Oc; Oct. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Ephemerides and observations of Mars by means of an astrolabe (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: In: Sun and planetary system; Oct 19, 1981 - Oct 23, 1981; Dubrovnik; Yugoslavia
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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