value quality siderealorsynodic author ref method 2.3820 1 Synodic Skiff 2023MPBu...50...74S Lightcurve 2.3886 2 Synodic Brozovic 2009IAUC.9053....2B Lightcurve 2.3886 3- Synodic Brozovic 2011Icar..216..241B Lightcurve