value quality siderealorsynodic author ref method 302.0000 2+ Synodic Polakis 2022MPBu...49..179P Lightcurve 34.0000 2 Synodic Warner 2009MPBu...36....7W Lightcurve 4.5000 2 Synodic Wisniewski 1997Icar..126..395W Lightcurve