value quality siderealorsynodic author ref method 6.3620 3 Synodic Casalnuovo 2022MPBu...49..105C Lightcurve 6.3650 3 Synodic Marchini 2021MPBu...48..206M Lightcurve 9.5380 2 Synodic Chelius 2023MPBu...50...41C Lightcurve