value quality siderealorsynodic author ref method 6.7770 2 Synodic McNeill 2019ApJS..245...29M Lightcurve 6.7824 2 Synodic Pal 2020ApJS..247...26P Lightcurve 6.7829 2+ Synodic Behrend LCDB Lightcurve 6.7830 2 Sidereal Durech 2016A&A...587A..48D Model 6.7840 3 Synodic Behrend LCDB Lightcurve 6.7857 3- Synodic Behrend LCDB Lightcurve 6.7960 2 Synodic Waszczak 2015AJ....150...75W Lightcurve