value quality siderealorsynodic author ref method 10.6100 2 Synodic Thirouin 2016AJ....151..148T Lightcurve 6.0000 Synodic Perna 2009A&A...508..451P Lightcurve 6.0000 1 Synodic Perna 2008DPS....40.4708P Lightcurve