The Nautical Almanac and Astronomical Ephemeris for the Year ...order of the Lords Commissioners of the Admiralty, 1819 |
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24 JUPITER Aldebaran Antares Aquilæ Arietis Astronomer Royal ASTRONOMICAL OBSERVATIONS Board of Longitude Calculations Centre from SUN clock Commissioners computed corrected D's Node Diff DISTANCES of Moon's Eclipses of Jupiter's Emersions Ephemeris fixed Stars Fomalhaut Geocentric Geocentric Long H GEORGIAN h SATURN H. M. S. Days Heliocentric Immersions John Pond Latitude Longitude at Sea Lunar Tables M. S.
M. S.
M. S.
M. S. Noon MAYER'S Merid Method Midn Month Moon's Centre Moon's Latitude MOON'S Longitude MOON'S Right Ascension Motion NAUTICAL ALMANAC O's Semidiam Parallax Passage Declin passing the Meridian Pegasi PLANETS Pollux Price Proportional Logarithm Quarter Full Moon Reflecting Telescopes Regulus Requisite Tables Reward or Sum Royal Observa Royal Observatory SAMUEL VINCE SATELLITES OF JUPITER Spica STARS EAST STARS WEST subtract SUN's Equation Sun's right Ascension Sund Sunday Telescopes TOBIA MAYER tory at Greenwich Trinity Week WILLIAM BAYLY XVh XVIII
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Side 125 - Columns of the second Page of the Month contain the Day of the Week and Month, as before; next follow the Sun's Longitude, right Ascension in Time, Declination, and the Equation of Time with its Difference from Day to Day.
Side 127 - Motion, such as that of Clocks and Watches ought to be. This Retardation or Acceleration of the Sun's coming to the Meridian is called the Equation of Time, and is contained in the last Column but one of Page II.
Side 125 - Increase : saying, as 24h is to the Hour from Noon reckoned by the Meridian of Greenwich, so is the daily Variation of the Sun's Longitude, to a fourth Number; which, added to the Sun's Longitude at the preceding Noon, gives the true Longitude at the given Time.
Side 127 - Column but one of Page II. and when applied according to its Title to the apparent Time, or that deduced immediately from the Sun, gives the mean or equated Time, whence the Error of a Clock or Watch may be found, and, if required, it may be corrected. If it be...
Side 129 - It was hoped that some Means might be found of using proper Telescopes on Shipboard to observe these Eclipses : and could this be effected, it would be of great service in ascertaining the Longitude of a Ship from time to time. In my voyage to Barbadoes, under the Directions of the COMMISSIONERS OF LONGITUDE, in 1763, I made a full trial of the late Mr.
Side 125 - Day are the same in this Method as in the civil Account at Noon, and from Noon till Midnight; but from Midnight till Noon they differ; for whereas in the civil Account a...