Hourangle to Sexagecimal
Sexagesimal
Sexagesimal System is a numeral system based on the number 60, commonly used to express angles and time. In astronomy, angles are often written in sexagesimal notation, dividing degrees into minutes and seconds (1 degree = 60 minutes, 1 minute = 60 seconds). Similarly, time is divided into hours, minutes, and seconds. This system has historical roots in ancient civilizations and is still useful for precise astronomical measurements.
Hour Angle
Hour Angle is a measure of time, expressed in angular units, that describes the position of a celestial object relative to an observer's local meridian. It represents the angle between the observer's meridian and the object's right ascension. The hour angle increases as the Earth rotates, with 1 hour of time corresponding to 15 degrees of rotation. When the hour angle is zero, the object is at its highest point in the sky, crossing the observer’s meridian.