Eclipsing events in the binary system of the asteroid 90 Antiope

Details Eclipsing events in the binary system of the asteroid 90 Antiope Eclipsing events in the binary system of the asteroid 90 Antiope

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...396..293m&link_type=abstract

Astronomy and Astrophysics, v.396, p.293-299 (2002)

Astronomy and Astrophysics

Astrophysics

9

Techniques: Photometric, Minor Planets, Asteroids

Scientific paper

CCD observations of the binary asteroid 90 Antiope were carried out at four observatories (Borowiec, Pic du Midi, Kharkiv, and Chateau Renard) on 26 nights from October 2001 through February 2002. The results show a two-component lightcurve with each showing the same period of 16.505 +/- 0.002 hours. The first component (with the amplitude of 0.10 mag) is associated with the rotation of two non-spherical bodies of the system; the second one, showing two sharp minima (with the amplitude in the range 0.05-0.12 mag, depending linearly on the phase angle) is due to eclipses in the binary system. The lightcurve suggests a synchronous rotation. The orientation of the system's orbit has been determined from the analysis of both the amplitudes and the duration of the eclipses. Some predictions of the possibility of observations of the eclipsing events during future oppositions have also been made.

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