2mass-planck-allsky

Rotational Properties of Three Hilda Asteroids

January 2020 • 2020MPBu...47...66W

Authors • Williamson, B. • Sonnett, S. • Witry, J. • Chatelain, J. • Grav, T. • Reddy, V. • Lejoly, C. • Kramer, E. • Mainzer, A. • Masiero, J. • Gritsevich, M. • Bauer, J.

Abstract • We determine the rotation periods, lightcurve amplitudes, and H-G parameters for three Hilda asteroids with previously measured large brightness variations. We measured a rotation period of 8.4070 ± 0.0009 h and amplitude of 0.64 ± 0.04 R-mag, HR = 14.56 ± 0.03 mag, and GR = 0.44 ± 0.08 for (64390) 2001 UY149. For (16927) 1998 FX68, we measure a rotation period of 33.85 ± 0.07 h, an amplitude of 0.68 ± 0.04 R-mag, HR = 12.02 ± 0.06 mag, and GR = 0.7 ± 0.2. For (209512) 2004 RO2, we determine a rotation period of 15.78 ± 0.02 h, an amplitude of 0.30 ± 0.04 r'mag, Hr' = 15.40 ± 0.06 magnitudes, and Gr' = 0.4 ± 0.1.

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Joe Masiero

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