Data sources:
LZ: V.M.Lyuty, G.V.Zaitseva, Astron. Letters V.26, 9, 2000;
G.V.Zaitseva, Pisma v AZh V.31, No.2, 116, 2005.
GK: Observations by V.P.Goranskij and E.A.Karitskaya using photoelectric WBVR photometer by V.G Kornilov and 1-m telescope of Tien-Shan Astronomical Observatory, Kazakhstan.
SV,79: Observations by V.P.Goranskij, E.A.Karitskaja and S.Yu.Shugarov using photoelectric UBV photometer by S.Yu.Shugarov and I.M.Volkov (79 - with photomultiplier FEU-79 in the BVR mode). 70-cm telescope of SAI Moscow Observatory and 60-cm telescope of INASAN Zvenigorod Station in the Moscow region.