value quality siderealorsynodic author ref method 10.8300 2 Synodic Debehogne 1978A&AS...32..127D Lightcurve 11.2000 2 Synodic Ruthroff 2010MPBu...37..158R Lightcurve 14.5600 2+ Synodic Ruthroff 2011MPBu...38...86R Lightcurve 21.7770 3- Synodic Hills 2013MPBu...40...89H Lightcurve 21.7970 3 Synodic Pilcher 2012MPBu...39...13P Lightcurve 21.8000 1 Synodic Behrend LCDB Lightcurve 21.8000 3 Synodic Pilcher 2014MPBu...41..244P Lightcurve 21.8070 2 Synodic Behrend LCDB Lightcurve 21.8080 3 Synodic Pilcher 2014MPBu...41..244P Lightcurve 21.8120 3 Synodic Pilcher 2014MPBu...41..244P Lightcurve 21.8130 3 Synodic Pilcher 2014MPBu...41..244P Lightcurve 21.8220 3- Synodic Behrend LCDB Lightcurve