Observatorium Ilmu FalakUniversity of Muhammadiyah North Sumatra .
217 Denai St, Post Graduate Building 7th Floor, Medan City, Indonesia. Postal Code: 20226.
Ajraini Nazli Institut Teknologi Bandung Indonesia
ajraininazlikhan@gmail.com
Nadiya Rahma Ardilla Universitas Muhammadiyah Sumatera Utara Indonesia
Ilmu Falak Universitas Muhammadiyah Sumatera Utara