value quality siderealorsynodic author ref method 20.0000 Synodic Debehogne 1983Icar...55..236D Lightcurve 45.8400 2 Synodic Bembrick 2005MPBu...32...45B Lightcurve 46.5508 2 Sidereal Hanus 2016A&A...586A.108H Model 46.5510 3 Synodic Pilcher 2009MPBu...36..100P Lightcurve