Coordinated observations of asteroids 1219 Britta and 1972 Yi Xing

Details Coordinated observations of asteroids 1219 Britta and 1972 Yi Xing Coordinated observations of asteroids 1219 Britta and 1972 Yi Xing

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...71..148b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 71, July 1987, p. 148-158.

Astronomy and Astrophysics

Astronomy

2

Asteroids, Astronomical Spectroscopy, Electrophotometry, Light Curve, Flyby Missions, Galileo Spacecraft, Interstellar Extinction, Asteroids, Britta, Yi Xing, Earth-Based Observations, Physical Properties, Characteristics, Rotation Period, Retrograde Motion, Lightcurves, Albedo, Amplitude, Classification, Spectra, Optical Properties, Magnitude, Data, S Asteroids, Color, Telescope Methods, Photoelectric Methods, Period, Reflectance, Orbital Elements, Astronomy

Scientific paper

Britta's sidereal rotation period is found to be 5.57497±0.00013 hr and its rotation is retrograde. The lightcurve amplitude ranged from 0.60 to 0.70 mag, depending on phase angle. Britta can be classified as an S-type asteroid based on its measured spectra and albedo. The absolute magnitude and slope parameter derived from the lightcurve maxima are H0 = 11.67±0.03 and G0 = 0.30±0.04. A 0.002 mag deg-1 phase reddening in B-V was also measured. 1972 Yi Xing was less well observed but a unique synodic period of 14.183±0.003 hr was determined. The observed lightcurve amplitude was 0.18 mag. Five-color measurements are consistent with an S-type classification. For an assumed slope parameter G = 0.25, Yi Xing's (lightcurve maximum) absolute magnitude H0 = 13.32±0.01.

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