value quality siderealorsynodic author ref method 8.0890 2+ Synodic Marchini 2022MPBu...49...10M Lightcurve 8.0920 2+ Synodic Galdies 2022MPBu...49....1G Lightcurve 8.0935 2 Sidereal Durech 2020A&A...643A..59D Model