value quality siderealorsynodic author ref method 3.8340 3 Synodic Behrend LCDB Lightcurve 3.8100 3 Synodic Stephens 2003MPBu...30...46S Lightcurve 3.8220 2 Synodic Waszczak 2015AJ....150...75W Lightcurve 3.8220 3- Synodic Klinglesmith 2016MPBu...43..234K Lightcurve 3.8228 2 Sidereal Durech 2020A&A...643A..59D Model