value quality siderealorsynodic author ref method 13.5360 3- Synodic Carreno 2019MPBu...46..200C Lightcurve 13.7000 2 Synodic Ivarsen 2004MPBu...31...29I Lightcurve 13.7700 2 Synodic Behrend LCDB Lightcurve 13.7827 2 Sidereal Athanasopoulos 2022A&A...666A.116A Model