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Herner, K. Honscheid, K. Kuehn, K. Reil, L. N. da Costa, M. Aguena, M. E. C. Swanson, M. E. S. Pereira, M. Raveri, M. Smith, M. Soares-Santos, N. Kuropatkin, O. Alves, P. Doel, P. H. Bernardinelli, P. Wiseman, R. L. C. Ogando, R. Miquel, R. Navarro-Escamilla, S. Allam, S. Desai, S. Everett, S. R. Hinton, T. M. C. Abbott","submitted_at":"2023-03-23T17:08:32Z","abstract_excerpt":"We combine photometry of Eris from a 6-month campaign on the Palomar 60-inch telescope in 2015, a 1-month Hubble Space Telescope WFC3 campaign in 2018, and Dark Energy Survey data spanning 2013--2018 to determine a light curve of definitive period $15.771\\pm 0.008$~days (1-$\\sigma$ formal uncertainties), with nearly sinusoidal shape and peak-to-peak flux variation of 3\\%. 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