value quality siderealorsynodic author ref method 27.5300 2+ Synodic Linder 2017MPBu...44...95L Lightcurve 32.2600 3- Synodic Warner 2017MPBu...44...22W Lightcurve 32.6600 2 Synodic Vaduvescu 2017EM&P..120...41V Lightcurve