value quality siderealorsynodic author ref method 9.8390 2 Synodic McNeill 2019ApJS..245...29M Lightcurve 9.8443 2 Sidereal Hanus 2013A&A...551A..67H Model 9.8443 2 Sidereal Martikainen 2021A&A...649A..98M Model 9.8458 3 Synodic Oey 2008MPBu...35..132O Lightcurve 9.8474 2 Synodic Pal 2020ApJS..247...26P Lightcurve