--- name: ΞΆ Mon constellation: Mon created_by: editor.cs created_date: 2023-11-05 16:47:04.633368 updated_by: editor.cs updated_date: 2023-11-05 16:47:04.633371 --- Optical double star. The primary component has a brightness of 5mag, its companion has a brightness of 8.5mag. It is located at a separation of 66.4". Another companion can be found at a distance of 32". We need a telescope with a 7cm diameter objective.