Quadruple extrema in the complex lightcurve of the asteroid 37 Fides?

Details Quadruple extrema in the complex lightcurve of the asteroid 37 Fides? Quadruple extrema in the complex lightcurve of the asteroid 37 Fides?

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..419s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 105, no. 2, Jan. 1982, p. 419-421. Sponsorship: Fonds zur Foerderung der wisse

Astronomy and Astrophysics

Astrophysics

6

Asteroids, Light Curve, Ubv Spectra, Electrophotometry, Extremum Values, Planetary Rotation, Asteroids, Light Curve, 37 Fides Asteroid, Observations, Amplitude, Photoelectric Observations, Photometry, Ultraviolet, Wavelengths, Data, Telescopic Observations, Characteristics, Physical Properties, Period, Absolute Magnitude, Colors, Comparisons

Scientific paper

The asteroid 37 Fides was reobserved at ESO in Aug. 1979 and a period of rotation P = 14.66 h + or - 0.03 h (0.611 d + or 0.001 d) was deduced, which rules out the published value of P = 4.0 h by Scaltriti and Zappala(1978). The lightcurve amplitude is now 0.16 m. The new period is also supported by recent observations reported from Scaltriti and Zappala(1981) and Harris (1981). As no fit for the lightcurve with P = 7.33 h was possible, 37 Fides shows a complicated lightcurve with four distinct and different maxima and four minima, which is unique among the asteroids until now. There is also some evidence that the period could be longer and the lightcurve even more complex than presented now. Absolute magnitudes V(bar)(1,0) = 7.42 and V0(1,0) = 7.36 were derived, the colors are B-V = 0.84 and U-B = 0.40 with no variation during all rotational phases exceeding the scatter of 0.02.

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