1. Astronomical Observatory , Volgina 7, 11000 Belgrade , Serbia
2. Ankara University, Faculty of Science, Astronomy & Space Sciences Department , Tandoğan, TR-06100 Ankara , Türkiye
3. Ankara University, Astronomy and Space Sciences Research and Application Center (Kreiken Observatory) , İncek Blvd., TR-06837 Ahlatlıbel, Ankara , Türkiye