1. South African Astronomical Observatory, PO Box 9 Observatory, Cape Town, South Africa
2. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
3. MSPE Department, School of Education, College of Education, University of Rwanda, PO Box 5039, Kigali, Rwanda
4. Ethiopian Space Science and Technology Institute (ESSTI), Entoto Observatory and Research Center (EORC), Astronomy and Astrophysics Research Division, PO Box 33679, Addis Ababa, Ethiopia
5. Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spain
6. Southern African Large Telescope, P.O. Box 9 Observatory, Cape Town, South Africa