Data sources:


s1,s2: BVRc photometry by D.V. Oparin, R.I. Uklein, E.A. Malygin, V.P. Goranskij and with the Russian 6-m BTA telescope and SCORPIO-1 and SCORPIO-2 cameras.
z: CCD BVRc photometry by V.P Goranskij with the SAO 1-m Zeiss telescope.
A5: CCD BVRc photometry by V.P Goranskij with the SAI 50-cm Maksutov meniscus telescope and Apogee Alta U8300 camera. telescope.