The Direction of the North Pole and the Control Network of Asteroid 243 Ida

Details The Direction of the North Pole and the Control Network of Asteroid 243 Ida The Direction of the North Pole and the Control Network of Asteroid 243 Ida

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996icar..120...33d&link_type=abstract

Icarus, Volume 120, Issue 1, pp. 33-37.

Physics

10

Scientific paper

A control network containing 64 points identified on Galileo images obtained during the August 1993 flyby was used to determine the direction of Ida's north pole. We find the right ascension and declination (in J2000 coordinates) to be alpha_0 = 348.76 deg +/- 7.5 deg, delta_0 = 87.10 deg +/- 0.4 deg. This result agrees reasonably well with earlier determinations from groundbased observations of Ida's lightcurve. We confirm that the rotation is retrograde, but we lack the time base to improve the rotation period of 0.1930680 days determined from lightcurve analysis (Binzel, R. P., S. M. Sivan, P. Magnusson, W. Z. Wisniewski, J. Drummond, K. Lumme, M. A. Barucci, E. Dotto, C. Angeli, D. Lazzaro, S. Mottola, M. Gonano-Beurer, T. Michalowski, G. De Angelis, D. J. Tholen, M. Di Martino, M. Hoffmann, E. H. Geyer, and F. Velichko 1993. Icarus 105, 310-325).

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