celestial navigation, the hour angle is the dihedral angle between the meridian plane (containing Earth's axis and the zenith) and the hour circle (containing...

\tan \delta } where: ω ∘ {\displaystyle \omega _{\circ }} is the solar hour angle at either sunrise (when negative value is taken) or sunset (when positive...

to the hour circle passing through the object. Unlike right ascension, hour angle is always increasing with the rotation of Earth. Hour angle may be considered...

geometry, an angle can refer to a number of concepts relating to the intersection of two straight lines at a point. Formally, an angle is a figure lying...

and 180 degrees when the hour angle, h, is negative (morning) and the angle between 180 and 360 degrees when the hour angle, h, is positive (afternoon)...

{\displaystyle \alpha _{s}=90^{\circ }-\theta _{s}} h {\displaystyle h} is the hour angle, in the local solar time. δ {\displaystyle \delta } is the current declination...

and hour angle at a specific location, modify the formula for a spherical Earth. Replace φ2 with declination and longitude difference with hour angle, and...

an hour circle at any time. The hour circle is a subtype whereby it is expressed in hours as opposed to degrees, radians, or other units of angle. The...

astronomy, the parallactic angle is the angle between the great circle through a celestial object and the zenith, and the hour circle of the object. It...

official noon. This correction can easily be made by rotating the hour-lines by a constant angle equal to the difference in longitudes, which makes this a commonly...

rose) 6 hours (astronomical hour angle) Throughout history, carpenters and masons have known a quick way to confirm if an angle is a true right angle. It...

By measuring the angle of the celestial body in the sky, the observer can get the local hour angle (LHA) of X, which is the angle subtended at P between...

average of Q over a day is the average of Q over one rotation, or the hour angle progressing from h = π to h = −π: Q ¯ day = − 1 2 π ∫ π − π Q d h {\displaystyle...

thousands of years. Mean solar time is the hour angle of the mean position of the Sun, plus 12 hours. This 12 hour offset comes from the decision to make...

Calculate the sunset hour angle using the sunset equation; Calculate the sunset time, which is the solar noon time plus the sunset hour angle in degree divided...

positions of navigational stars — expressed as declination and sidereal hour angle — are often rounded to the nearest degree. In addition to tables, star...

the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. The declination angle is measured...

the sunrise hour angle using the sunrise equation; Calculate the sunrise time, which is the solar noon time minus the sunrise hour angle in degree divided...

altitude Equatorial coordinates α, right ascension δ, declination h, hour angle Ecliptic coordinates λ, ecliptic longitude β, ecliptic latitude Galactic...

sight must be known so that the celestial position i.e. the Greenwich Hour Angle (Celestial Longitude - measured in a westerly direction from Greenwich)...

Look up hour in Wiktionary, the free dictionary. An hour is a unit of measurement of time. (The) Hour(s) may also refer to: Hour angle, the measurement...

to 24h. It is important not to confuse sidereal hour angle with the astronomical concept of hour angle, which measures the angular distance of an object...

sidereal time can be used to determine the time of its culmination (see hour angle). The term meridian comes from the Latin meridies, which means both "midday"...

Apparent solar time can be obtained by measurement of the current position (hour angle) of the Sun, as indicated (with limited accuracy) by a sundial. Mean solar...

azimuth Zn must be computed. The local hour angle, LHA, is the difference between the AP longitude and the hour angle of the observed object. It is always measured...

the hour-lines on the horizontal surface are uniformly drawn. The angle between successive hour-lines is constant. The hour-lines for successive hours are...

horsepower-hour (hph), a measure of energy used in the railroad industry hour angle, a measure of the angle between the meridian plane and the hour circle...

In 1931, Longines collaborated with Charles Lindbergh to introduce the Hour Angle aviation watch. In 1937, P.V.H. Weems again collaborated with Longines...

Kurt Steven Angle (born December 9, 1968) is an American retired professional wrestler and amateur wrestler. He first earned recognition for winning a...

longitude is now added or subtracted to the Greenwich Hour Angle of the object to obtain the local hour angle, that is the difference in longitude between the...