Lunar and horary tables, for ... ascertaining the longitude |
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... objects of the work . They consist of a general adaptation of the references to the present arrangement of the Nautical Almanac . The substitution of the Sidereal Time Mean Noon for the Sun's Right Ascension , the former being less ...
... objects of the work . They consist of a general adaptation of the references to the present arrangement of the Nautical Almanac . The substitution of the Sidereal Time Mean Noon for the Sun's Right Ascension , the former being less ...
Seite
... object by computation - On finding the longitude by Chronometers On finding the errors and rates of Chronometers Remarks on the management of Chronometers Table A. * Acceleration of the fixed Stars in mean time Introductory remarks on ...
... object by computation - On finding the longitude by Chronometers On finding the errors and rates of Chronometers Remarks on the management of Chronometers Table A. * Acceleration of the fixed Stars in mean time Introductory remarks on ...
Seite 2
... object is found by applying its semi- diameter , and the dip of the horizon , ‡ to its observed altitude . The dip is always subtractive . The semidiameter is to be added or sub- tracted , according as the lower or upper limb of the object ...
... object is found by applying its semi- diameter , and the dip of the horizon , ‡ to its observed altitude . The dip is always subtractive . The semidiameter is to be added or sub- tracted , according as the lower or upper limb of the object ...
Seite 3
... object is its distance from the elevated Pole of the observer . Hence , when the latitude of the place of ob- servation , and the declination of the observed object , are both of the same name ( that is , both North or both South ) ...
... object is its distance from the elevated Pole of the observer . Hence , when the latitude of the place of ob- servation , and the declination of the observed object , are both of the same name ( that is , both North or both South ) ...
Seite 10
... Objects , and the Moon's Horizontal Parallax : to find the True Distance . Method I. RULE . 1. To the logarithm of the Moon's horizontal parallax , add the logarithm of the apparent altitude of the Sun , Planet , or Star , and the ...
... Objects , and the Moon's Horizontal Parallax : to find the True Distance . Method I. RULE . 1. To the logarithm of the Moon's horizontal parallax , add the logarithm of the apparent altitude of the Sun , Planet , or Star , and the ...
Häufige Begriffe und Wortgruppen
Add for Seconds ALDEBARAN apparent distance Arcturus astronomical Betelguese Chro Constellation Corr D's App daily rate decg decl deduced degrees Deneb Diff ecliptic error and rate error for mean EXAMPLE find the Error find the mean finding the longitude Fixed Star Greenwich date Greenwich mean horary angle incg index error interval LOGARITHMS LOGARITHMS of NUMBERS lunar distances M. T. Gwh mean noon merid Moon's app Moon's apparent altitude Moon's hor Moon's horizontal parallax Moon's red natural number natural versed sine Nautical Almanac nearly object observed altitude observed distance observed East opposite place of observation Planet polar distance Pole Star prime vertical PROPORTIONAL LOGARITHMS refraction right ascension SECOND CORRECTIONS SECOND DIFFERENCE semid Sextant slow for mean Star's subtracted SUM and DIFFERENCE SUM OR DIFFERENCE Sun's Apparent Altitude Sun's declination Sun's true Table taken Telescope Ther THIRD CORRECTION true altitude true distance tude Ursa Major watch West
Beliebte Passagen
Seite 70 - 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.
Seite 54 - Gamma ; and so on. When the number of stars in a constellation, exceeds the letters in the Greek alphabet, the letters of the Roman alphabet, a, b, c, d, &c. are applied to the remaining stars in the same manner ; and when these are not sufficient, the numbers, 1, 2, 3, 4, 5, &c.
Seite 56 - Aries, the Ram ; 2. Taurus, the Bull ; 3. Gemini, the Twins ; 4. Cancer, the Crab ; 5. Leo, the Lion ; 6. Virgo, the Virgin ; 7. Libra, the Balance ; 8. Scorpio, the Scorpion; 9. Sagittarius, the Archer ; 10. Capricornus, the Goat; 11. Aquarius, the Water-bearer ; 12. Pisces, the Fishes.
Seite 9 - ... 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...
Seite 63 - 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.
Seite 25 - Rule. — Find the latitudes of both places; if both be north, or both south, their difference will be the answer; but if one be north and the other south, their sum will be the answer. Exercise.— What is the difference of lat. between Philadelphia and Petersburg? Ans., 20 degrees. Between Madras and Waterford? Am., 39° 13'.