The declination of a heavenly body is its angular distance from the equinoctial or celestial equator. |
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He also determined the latitude and longitude of many stars, and measured the greatest declination of the planet Mercury. |
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While sipping hot tea, I tweak my compass declination and draw bearing lines on our map. |
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Fourier series numerical algorithms were used to compute solar declination and the equation of time. |
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Consistently, equinoctial markers and alignments were made to an declination well over half a degree to the north. |
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On the North Rim the difference between map and compass is 15 east, a distinction known as magnetic declination. |
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Gellibrand's most famous scientific discovery was the change over the years in magnetic declination. |
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Proposals were being made to solve the longitude problem and in 1673 one based on magnetic declination was proposed by a certain Henry Bond. |
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He also studied magnetic declination and was the first to observe the secular variation. |
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The higher coercivity component has a inclination that is steeper than expected and a NW declination. |
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Strands of her black hair fell smoothly to the sides when she shook her head in declination. |
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Also every month, the Moon will reach its minimum declination at 18 north or south. |
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The declination variometer enables us to measure variations in the declination of the Earth magnetic field. |
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Extended lines that mark the constant magnetic declination away from the agonic line are called isogonic lines. |
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West of the agonic line, the needle points east of true north, and has an easterly or positive declination. |
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To calculate the distance we need to know the declination of the sun on a given day. |
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A star on the north side of the equinoctial is in northern declination, and one on the southern side is in southern declination. |
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If your co-latitude plus the declination of the star is greater than zero, then it will rise above your horizon at least sometime during the year. |
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The deflection of the compass needle from True North is called magnetic variation or declination. |
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This latitude corresponds to the northernmost declination of the Sun's ecliptic to the celestial equator. |
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The magnetic declination is the difference in degrees between the true north and magnetic north. |
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It was designed to measure local time as well as such things as zenith distances, meridian pass time as well as such declination of the stars with remarkable precision. |
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The declination of the magnetization further reveals the direction to the magnetic pole at the time of the magnetization. |
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The brand from Schaffhausen offers us, through this new declination of its mascot model, the Portuguese, a watch of great classicism. |
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The source for the magnetic declination should be current as the declination changes over time. |
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Because magnetic North and true North are not at the same location, you must set the declination on your compass. |
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Magnetic reference field models provide an easy way to calculate magnetic declination and other components of the magnetic field. |
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A copy of the insurance policy in addition to five letters of declination should be included with the completed application. |
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Its radiant has as co-ordinates 15h 20m in right ascension and 49 degrees in declination, it is located in the constellation of the Herdsman. |
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Therefore, compass readings need to be corrected for this error, called magnetic declination. |
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We feel in a comfort zone, but the brand offers us a declination that has its own character. |
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Beneath the diagram is a statement informing the user about the annual change of declination. |
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Should you wish to display the magnetic North at a later stage, you will need to reset the declination. |
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He did publish on electricity and magnetism, the variation of magnetic declination with time as well as several publications on optics and astronomical topics. |
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Use this feature to adjust the slope declination, as required. |
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The number of times per year that a compass user will be affected by changes in declination caused by magnetic storms will depend both on the user's application and location. |
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Zacuto's Almanach supplied the first accurate table of solar declination, allowing navigators to use the sun instead. |
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The heliocentric view explains the true orbital relationship between the sun and earth and considers the earth's elliptical orbit, its tilt, and the declination angle. |
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The declination limit for full hour-angle coverage is 17 degrees. |
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Right ascension and declination define the position of a celestial object. |
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In the early eighteenth century Edmund Halley noticed that the agonic line, the line of zero declination on a declination chart, was slowly moving westward. |
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The proper calibration of the compass requires that you calibrate the compass against the magnetic north and set the declination value according to your location. |
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The angle between the geographic north and the magnetic north is known as magnetic declination and changes slightly with time and strongly with location. |
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Jupiter has two families of small and distant satellites having a strong declination on the Jupiter equator: families of Himalia and Pasiphae, whose rotation around Jupiter is retrograde. |
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Front and back of the chart show the northern and southern hemispheres of the sky with an overlap of 54° declination each beyond the celestial equator. |
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Astronomic latitude is calculated from angles measured between the zenith and stars whose declination is accurately known. |
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By the 17th century several instruments had been designed to measure the magnetic declination. |
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By the time of dichotomy in late October the planet's declination will be well south of the celestial equator. |
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An isoporic line refers to a line of constant annual variation of magnetic declination. |
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The declination of the observer's zenith also is zero and therefore so is his latitude. |
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Although the magnetic declination does shift with time, this wandering is slow enough that a simple compass remains useful for navigation. |
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By multiplying the annual change by the number of years that have elapsed since the chart was published and adding the total change to the published declination value, the user obtains the present day declination. |
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Over hundreds of years, magnetic declination is observed to vary over tens of degrees. |
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Thus the grid lines varied slightly for charts produced in different eras, due to the natural changes of the Earth's magnetic declination. |
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The local magnetic declination is given on most maps, to allow the map to be oriented with a compass parallel to true north. |
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Magnetic observations were a natural adjunct to land surveying: To measure magnetic declination you needed to determine azimuth, latitude and longitude by astronomical means. |
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This means that when you are using orienteering maps you need to turn the declination correction off by setting the declination value to 0 degrees. |
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The effect of this means a map with the latest declination information should be used. |
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The angle in between magnetic and true north is your declination. |
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Some magnetic compasses include means to manually compensate for the magnetic declination, so that the compass shows true directions. |
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The astronomical position calculated from an ephemeris is given in the spherical polar coordinate system of right ascension and declination. |
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Due to precession, Crux will move closer to the South Pole in the next millennia, up to 67 degrees south declination for the middle of the constellation. |
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Gravimetric and magnetometric measurements for magnetic declination determination for topographic maps were started in 2007 by the Latvian Geospatial Information Agency. |
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An agonic line is drawn through points of zero magnetic declination. |
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Maps typically include information on the declination as an angle or a small diagram showing the relationship between magnetic north and true north. |
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During this period, mostly the magnetic declination was measured. |
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