value	quality	siderealorsynodic	author	ref	method
21.0121	2	Sidereal	Martikainen	2021A&A...649A..98M	Model
21.0122	2	Sidereal	Hanus	2016A&A...586A.108H	Model
21.0170	3-	Synodic	Garceran	2015MPBu...42..235G	Lightcurve
21.0200	2	Synodic	Behrend	LCDB	Lightcurve
21.0240	3-	Synodic	Behrend	LCDB	Lightcurve
21.1010	2	Synodic	Worman	2003MPBu...30...32W	Lightcurve