اوج‌رسی (نجوم)

thumb| Upper (oK) and lower culmination (uk) thumb|Method of observation of culminations in ancient Egypt In observational astronomy, culmination is the passage of a celestial object (such as the Sun, the Moon, a planet, a star, constellation or a deep-sky object) across the observer's local meridian. These events are also known as meridian transits, used in timekeeping and navigation, and measured precisely using a transit telescope.