Photoelectric photometry of asteroids 45, 120, 776, 804, 814, and 1982DV

Details Photoelectric photometry of asteroids 45, 120, 776, 804, 814, and 1982DV Photoelectric photometry of asteroids 45, 120, 776, 804, 814, and 1982DV

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...55..236d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 55, Aug. 1983, p. 236-244.

Astronomy and Astrophysics

Astronomy

23

Asteroids, Astronomical Photometry, Electrophotometry, Light Curve, Planetary Rotation, Asteroids, Photoelectric Observations, Photometry, Lightcurves, Data, 45 Eugenia, 120 Lachesis, 776 Berbericia, Rotation, Period, Amplitude, 804 Hispania, 814 Tauris, Comparisons, Classification, 1982Dv Asteroid, Wavelengths, S Asteroids, C Asteroids

Scientific paper

Photoelectric light curves for six asteroids using the ESO 50-cm photometric telescope are presented. A brightness amplitude of 0.09-0.10 is found for 45 Eugenia. For 120 Lachesis, the decrease in brightness during single-night lightcurves and a long, nearly flat trend suggest a period much longer than 20 hr. The 776 Berbericia was observed to eliminate the ambiguity between 23 h aand 15.3 h periods; the longer period is ruled out, and a very plausible shorter period of 7.762 h is suggested, implying, at least for this opposition, one maximum and one minimum per cycle. A similar ambiguity for 804 Hispania is discussed. Lightcurves for 814 Tauris confirm that it belongs to an intermediate-size group of dark asteroids with long periods. A period longer than 16 h and an amplitude larger than 0.4 m were established for the earth-approaching 1982DV.

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