Circle To Hour Angle ( To H) Converter

The “Circle To Hour Angle (To H) Converter” is a useful tool designed to help you convert angular measurements in a circle into their corresponding hour angles, which are commonly used in astronomy and celestial navigation. Understanding these conversions allows you to determine the position of celestial objects relative to the observer’s local meridian.

In this context, a “circle” typically refers to an angle measured in degrees, where a full circle equals 360 degrees. The “hour angle” (To H) is a measure of time expressed in hours, minutes, and seconds, indicating how far an object has moved across the sky from the observer’s local meridian.

The basic formula to convert an angle in degrees (Circle) to an hour angle (To H) is:

To H (hours) = (Circle in degrees) / 15

This formula is based on the fact that 360 degrees correspond to 24 hours, so each hour equals 15 degrees (since 360° / 24 hours = 15° per hour). To convert degrees to hours, divide the degree measurement by 15.

For example, if you have an angle of 45 degrees, the conversion to hour angle would be:

To H = 45° / 15 = 3 hours

This tool simplifies the process, allowing you to input an angle in degrees and instantly obtain the corresponding hour angle in hours, making it easier to interpret celestial positions and perform astronomical calculations.