Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...147...35z&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 147, no. 1, June 1985, p. 35-38. Research supported by the Oesterreichische Ak
Astronomy and Astrophysics
Astronomy
9
Asteroids, Light Curve, Planetary Rotation, Spin Dynamics, Ambiguity, Planetary Evolution, Statistical Analysis, Asteroids, Spin, Astronomy, Observations, Size, Period, Lightcurves, Aspasia, Diotima, Surface, Morphology, Fragments, Catalog
Scientific paper
New observational evidence supports the importance of the ambiguity problem about determination of the spin rate of asteroids. In the range of objects larger than about 150 km, where equilibrium figures are thought to exist, and therefore where irregular fragments should be absent, four cases of periods shorter by a factor two than the previously adopted values, believed unambiguous, were recently found. This paper presents results for two of them (409 Aspasia and 423 Diotima), attempting to give plausible physical interpretations, but admitting that a quantitative explanation cannot be reached with the present knowledge of the asteroids' surface morphology. Still, the discrepancies found in preliminary analyses seem to be satisfactorily overcome.
Hanslmeier Arnold
MArtino Di. M.
Schober Hans Josef
Zappala Vincent
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