1. International Center for Astronomical and Medico-Ecological Research , Zabolotnoho Str 27 , Kyiv 03143, Ukraine
2. Toruń Centre for Astronomy, Nicolaus Copernicus University , Gagarina 11, PL-87-100 Toruń, Poland
3. Rzeszów University , al. T. Rejtana 16c, PL-35-959 Rzeszów, Poland