value quality siderealorsynodic author ref method 2.7710 3 Synodic Pravec LCDB Lightcurve 2.7690 2 Synodic Pal 2020ApJS..247...26P Lightcurve 2.7708 3 Synodic Pravec 2012Icar..218..125P Lightcurve 2.7709 3 Synodic Pravec 2012Icar..218..125P Lightcurve 2.7709 3 Synodic Oey 2009CBET.1835....1O Lightcurve 2.7710 3 Synodic Oey 2007MPBu...34...39O Lightcurve