sidereal hour

He had never had to work twenty sidereal hours a day, sleep four.

The sidereal hour angle is defined as 360 minus the right ascension.

Sidereal hour angle, used in celestial navigation, is similar to right ascension, but increases westward rather than eastward.

When one moves eastward 15 in longitude, sidereal time is larger by one sidereal hour (note that it wraps around at 24 hours).

However, the use of only one circumference unwittingly implies only one rotation in inertial space, so the corresponding time unit must be a sidereal hour.

The cycle's begin position, the stellar position and sidereal hour timing the eclipse, are used by later astronomers for calibrating their observations in relation to subsequent eclipses.

The sidereal hour angle (SHA) of a body on the celestial sphere is its angular distance west of the vernal equinox generally measured in degrees.

It is important not to confuse sidereal hour angle with the astronomical concept of hour angle, which measures angular distance of an object westward from the local meridian.

Annon judged it to be three sidereal hours before dawn when Giyan slowed their pace to a trot, then a walk, and finally halted beneath the thick canopy of a heartwood.

Analogous to terrestrial longitude, right ascension is usually measured in sidereal hours, minutes and seconds instead of degrees, a result of the method of measuring right ascensions by timing the passage of objects across the meridian as the Earth rotates.

Every detail of her life was a strugglefrom the conversion of the V'ornn measurement of time in sidereal hours to the Kundalan equivalent in lunar hours, from the food she was forced to eat to the cot she slept in.