value	quality	siderealorsynodic	author	ref	method
18.1900	2	Synodic	CALL	LCDB	Lightcurve
18.1980	3	Synodic	Mohamed	1994A&AS..108...69M	Lightcurve
18.2000		Synodic	Durech	2017A&A...604A..27D	Lightcurve
18.2087	2	Sidereal	Athanasopoulos	2022A&A...666A.116A	Model
18.2087	2	Sidereal	Hanus	2013A&A...551A..67H	Model
18.2088	2	Sidereal	Martikainen	2021A&A...649A..98M	Model
18.2100	2	Synodic	Koff	LCDB	Lightcurve