## Lunar and horary tables, for ... ascertaining the longitude |

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0F THE 3UN 0R 3TAR 12 hours 24 hours 5TAR alti APPARENT ALT1TUDE 0F apparent altitude Apparent Distance Argo Navis artificial horizon ascensions and declinations astronomical Chro Constellation Corr daily rate deduced DEGREE5 Deneb difference distance and altitudes error and rate error for mean EXAMPLE 11 fast for mean find the apparent find the Error finding the Longitude fixed Star Half Sum height horary angle horary distance Latitude Lunar Distances meridian method Moon's hor Moon's horizontal parallax Moon's semidiameter Nautical Almanac nearest limb noon at Greenwich object observed altitude observed distance observed east place of observation Pole Star Port Louis prime vertical Proportional Logarithms required the true Second Corrections semid Sextant Ship slow for mean subtracted Sun and Moon Sun's Declination Sun's parallax Sun's polar distance Sun's right ascension Sun's true altitude Table V1 taken telescope Third Correction true Longitude tude upper limb watch

### Popular passages

Page 44 - C, as seen above, are constants, depending upon the latitude of the place of observation and the declination of the star. Tables for these quantities will be found in an appendix to Annual Report US Coast and Geodetic Survey for 1874.

Page 36 - When there is a good opportunity for observing the distance between the Sun and Moon, or between the Moon and a Star...

Page 5 - ... will be the right ascension of the meridian. From the right ascension of the meridian (increased by 24 hours if necessary) subtract the sun's right ascension...

Page 153 - Subtract the true altitude of the sun's centre from 90°, and the remainder will be the sun's true meridian zenith distance, which is to be called north or south according as the observer is north or south of the sun at the time of observation.

Page 148 - The Hare The Great Dog The Little Dog The Ship The Hydra The Cup The Crow The Centaur The Wolf The Altar The Southern Crown The Southern Fish Cuntellatnm.

Page 8 - ... distance of a heavenly body from the moon. 1. Under the given distance put down the two computed distances of the same heavenly body found in the Nautical Almanac between which the given true distance lies. 2. Take the difference between the first and second, and also between the second and the third. 3. From the proportional logarithm of the first difference subtract the proportional logarithm of the second difference, the sum is the proportional logarithm of the additional time to be added...

Page 155 - For finding the Latitude by an Altitude of the Polar Star. This table is to be entered with the right ascension of the meridian at the time of observation ; the correction corresponding to which being added to, or subtracted from, the true altitude of the Polar Star, as denoted by the sign + or —, the sum or remainder will give the latitude of the place of observation, which is always North. The table is calculated particularly for the years...

Page 152 - Benetnach, the Star in the point of the tail of the Great Bear, and Deneb, in the tail of the Lion, is a.

Page 154 - ... to be on the meridian below the pole ; if the altitude be then taken, the latitude may thence be found as follows : — RULE. Correct the...