Remarkable modification of light curves for shadowing effects on irregular surfaces - The case of the asteroid 37 Fides

Details Remarkable modification of light curves for shadowing effects on irregular surfaces - The case of the asteroid 37 Fides Remarkable modification of light curves for shadowing effects on irregular surfaces - The case of the asteroid 37 Fides

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123..326z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. 326-330.

Astronomy and Astrophysics

Astrophysics

11

Asteroids, Astronomical Photometry, Light Curve, Electrophotometry, Phase Shift, Asteroids, Lightcurves, Shadows, Surface, 37 Fides, Analysis, Shape, Photoelectric Observations, Comparisons, Scattering, Absolute Magnitude, Photometry, Rotation, Period

Scientific paper

Photometric observations of the asteroid 37 Fides carried out at four observatories are reported. The data were taken at phase angles ranging from approximately 2-23 deg. A composite of the light curves obtained revealed that, considering a period of 7.33 hr, the full cycle light curve exhibits one maximum and one minimum. An increase in brightness was observed following a primary minimum, a factor that indicated the cyclical appearance and disappearance of a large topographical feature. It is concluded that the 7.33 hr period is the rotational speed of the asteroid, in contrast with a previously held 14.66 hr rotational period. The method is concluded useful for identifying rotational periods of asteroids when only partial light curve data from different sources is available, and when the projections can be checked observationally.

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