value quality siderealorsynodic author ref method 13.5100 2 Synodic Almeida 2004A&A...415..403A Lightcurve 29.4940 3 Synodic Gross 2003MPBu...30...44G Lightcurve 29.4974 2 Sidereal Durech 2020A&A...643A..59D Model