The American Nautical AlmanacBureau of Navigation, 1912 |
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Common terms and phrases
23 THE MOON'S 32 Apparent Right 9 IO II Apogee Apparent Declination Apparent Right Ascen ASCENSION AND DECLINATION assumed astronomical beginning Besselian change of declination column Day of Month Decl declination indicates declinations are decreasing Diff differences distance Earth ends eter found by subtracting Frid FRIDAY given GREENWICH APPARENT NOON GREENWICH MEAN NOON h m S 21 Hour hourly change II.I indicates that north IO II 12 JANUARY July June Last Quarter Latitude Logarithm mean equinox Mean Solar Mean Sun Merid Meridian of Greenwich Midnight MONDAY MOON'S RIGHT ASCENSION north declinations NOTE observation Perigee PHASES prefixed Radius Vector reduced referred sage SATURDAY Semidi Semidiam Semidiameter semidiameter for mean semidiameter passing Sidereal Noon sion of Mean Stationary Sun's Declination Sun's Equation Declination SUNDAY Table Thur THURSDAY true equinox Tues TUESDAY UPPER TRANSIT WEDNESDAY Week он
Popular passages
Page 178 - In the year 1896 there will be four eclipses, two of the Sun and two of the Moon.
Page 194 - Civil Time into Astronomical Time. — If the civil time is marked AM, take one from the day and add twelve to the hours, and the result...
Page 73 - The setnidiameter for mean noon may be assumed the same as that for apparent noon. The sign + prefixed to the hourly change of declination indicates that north declinations are increasing.
Page 84 - The mean time of semidiameter passing may be found by subtracting o-.i8 from the sidereal time. The sign + prefixed to the hourly change of declination indicates that north declinations »re increasing.
Page 194 - The civil day begins twelve hours before the astronomical day; therefore the first period of the civil day answers to the last part of the preceding astronomical day, and the last part of the civil day corresponds to the first part of the astronomical day. Thus, January...
Page 183 - RA of the mean sun for this time, as last explained: this being added to the local mean time will give the sidereal time. The sidereal time of mean noon, reduced for the longitude of the place, is also used in converting sidereal time to mean timo.
Page 184 - The last column on page III contains the Mean Time of Sidereal Noon; that is, the number of hours, minutes, and seconds after Greenwich mean noon when the vernal equinox passes the meridian of Greenwich. It may be reduced to any meridian, or to any Greenwich sidereal time, by using the hourly difference, — д".82д6 to effect the necessary interpolation.
Page 179 - The regions within which the eclipses of the Sun are visible are laid down on the accompanying charts, from which, by means of the dotted lines, the Greenwich...
Page 179 - Sun over the same meridian, and the time of day being the hour-angle of the Sun westward from the meridian. Owing to the obliquity of the ecliptic and to the lack of uniformity of the motion of the Earth in its orbit, the rate of motion of the Sun in...
Bibliographic information
| Title | The American Nautical Almanac |
| Contributors | United States. Navy Department, United States. Navy Department. Bureau of Equipment, United States Naval Observatory. Nautical Almanac Office, Great Britain. Nautical Almanac Office |
| Publisher | Bureau of Navigation, 1912 |
| Original from | Harvard University |
| Digitized | 6 Jul 2007 |
| Export Citation | BiBTeX EndNote RefMan |