觀測弧
قوس المراقبة
Дуга наблюдения
Дуга спостереження
Arc d'observació
Arc d'observation
Arco de observación
Observation arc
Arco de observação
bir asteroit veya kuyruklu yıldız gibi bir Güneş Sistemi gövdesinin en erken ve en son gözlemleri arasındaki süre
time between earliest and latest observations of a Solar System body like an asteroid or comet
Ar_h-zAccsY
Asteroid Hazards, Part 3: Finding the Path
Asteroid Hazards, Part 2: The Challenge of Detection