Pole orientation of asteroid 44 NYSA via photometric astrometry, including a discussion of the method's application and its limitations

Details Pole orientation of asteroid 44 NYSA via photometric astrometry, including a discussion of the method's application and its limitations Pole orientation of asteroid 44 NYSA via photometric astrometry, including a discussion of the method's application and its limitations

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...54...13t&link_type=abstract

Icarus (ISSN 0019-1035), vol. 54, April 1983, p. 13-22. Research supported by the National Geographic Society and NASA.

Astronomy and Astrophysics

Astronomy

35

Asteroids, Astrometry, Astronomical Photometry, Axes Of Rotation, Light Curve, Planetary Rotation, Polar Regions, Angular Velocity, Mars (Planet), Maxima, Orbital Elements, Phase Shift, Time Measurement, Ubv Spectra, Asteroids, 44 Nysa, Photometry, Astronomy, Astrometry, Techniques, Procedure, Observations, Periods

Scientific paper

The results of photometric astrometry, a method of determining the orientation of a rotation axis, as applied to asteroid 44 Nysa, are presented. The pole orientation of Nysa was found to be lambda(zero) = 100 deg, beta(zero) = +60 deg with an uncertainty of 10 deg. The sidereal period is 0.26755902 days + or - 0.00000006, and the rotation prograde. Refinements to, and limitations of, the application of the method of photometric astrometry are discussed. In light of the results presented herein, it is believed that all photometric astrometry pole determinations of the past should be redone.

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