value quality siderealorsynodic author ref method 8.6400 2 Synodic Melillo 2015MPBu...42...94M Lightcurve 8.6540 3 Synodic Burchi 1985A&AS...60....9B Lightcurve 8.6540 3 Synodic Tempesti 1969MmSAI..40..415T Lightcurve 8.6599 2 Sidereal Torppa 2003Icar..164..346T Model 8.6600 2 Synodic Behrend LCDB Lightcurve 8.6603 2 Sidereal Hanus 2016A&A...586A.108H Model 8.6603 2 Sidereal Viikinkoski 2017A&A...607A.117V Model 8.6603 2 Sidereal Vernazza 2021A&A...654A..56V Model 8.6608 2 Sidereal Dotto 1995Icar..117..313D Model 8.6610 3 Synodic Pilcher 2013MPBu...40..161P Lightcurve 8.6612 3- Synodic Behrend LCDB Lightcurve 8.6620 3 Synodic Erikson 1990acm..proc...55E Lightcurve 8.6622 3- Synodic Pilcher 2013MPBu...40..161P Lightcurve 8.6860 2 Synodic Riccioli 2001P&SS...49..657R Lightcurve