value quality siderealorsynodic author ref method 157.0000 2 Synodic Stephens 2021MPBu...48..150S Lightcurve 157.5636 2 Sidereal Martikainen 2021A&A...649A..98M Model 157.5650 2 Sidereal Durech 2020A&A...643A..59D Model 48.0000 Synodic Molnar 2018ApJS..234...37M Lightcurve