Physical studies of asteroids XVI - Photoelectric photometry of 17 asteroids

Astronomy and Astrophysics – Astronomy

Scientific paper

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Asteroids, Astronomical Photometry, Electrophotometry, Light Curve, Asteroids, Astronomy, Physical Properties, Telescope Methods, Amplitude, Photoelectric Methods, Photometry, Lightcurves, Earth-Based Observations, Classification, Spin, Optical Properties, Rotation, Period, Color, C Asteroids, S Asteroids, M Asteroids, Kirkwood Gaps, Characteristics, Hygiea, Fortuna, Circe, Leukothea, Freia, Ohio, Protogeneia, Honoria, Oppavia, Devosa, Budrosa, Campania, Aurelia, Vaticana, Alemannia, Amherstia, Irmgard

Scientific paper

The authors present photoelectric photometry of 17 asteroids observed during the period 1979 - 1986. Composite lightcurves have been derived for 76, 236, 439, 516 and 591, and at least a reasonable single-lightcurve coverage has been obtained for the majority of the remaining ones. Reference is made to Tholen's (1984) taxonomic classification and a brief discussion of lightcurve statistics in this framework is given. Differences between the spin rates and amplitudes of the C, S and M classes are considered and previous conclusions regarding the peculiar characteristics of M asteroids are confirmed. An indication is found that C and S asteroids have a particularly slow spin when situated near the 3/1 or 5/2 Kirkwood gaps.

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