CCD photometric observations of three Hilda asteroids were made at the Center for Solar System Studies (CS3) in 2019 September. Analysis of the 2019 data for 4495 Dassanowsky, a reported binary (Warner and Stephens, 2019), found three periods, one being very long (431 h). The long period and a secondary one made it a potential member of the but, for the first time for a member of this class, a third period seems to be present. A review of the 2018 data set using comparison star magnitudes from the ATLAS catalog (Tonry et al., 2018) found the previously unnoticed very long period. The secondary and tertiary periods were still in good agreement with the original two-period solution found in 2018. Though the odds are remote and considerable more data are required, the new results from the 2018 data are encouraging in the on-going effort to find evidence that validates claims of the existence of the class.
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A dynamical study of Hilda asteroids in the Circular and Elliptic RTBP.
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