The American Ephemeris and Nautical AlmanacU.S. Government Printing Office, 1899 |
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Common terms and phrases
Aldebaran Aldebaran W Antares Antares W Apparent Declination apparent noon APPARENT PLACES Apparent Right Ascension Aquarii Aquilæ JUPITER Arietis ASCENSION AND DECLINATION Besselian Cancri Capricorni Cephei CONSTANTS OF STRUVE d h m Day of Month Decl eclipse Ephemeris Fomalhaut Frid Geminorum GREENWICH MEAN NOON h m h m Heliocentric Horizontal Parallax Hour Angle July June Latitude Leonis Libræ Logarithm LUNAR DISTANCES Mean Solar Date Meridian Passage Minute Moon MOON'S RIGHT ASCENSION Name and Direction Orionis P. L. of Diff Parallax Pegasi Piscium Pollux Regulus Regulus W Right Declina Sagittarii SATURN SATURN W Semidiameter Sept Sextantis sidereal sion Solar Day Spica Spica W stars STRUVE AND PETERS Sun's Tauri Thur tion Ascension tion North tion South TRANSIT AT WASHINGTON True Longitude Tues UPPER TRANSIT Ursa Minoris VENUS Virginis WASHINGTON MEAN ΙΟ
Popular passages
Page 549 - Greenwich time corresponding to a given lunar distance we have the following rule:— Find in the Almanac the two distances between which the true distance falls; take out the nearer of these, the hours of Greenwich time over it, and the PL of Diff.
Page 543 - Solar time is that used for all the purposes of ordinary life, and is measured by the daily motion of the sun. A Solar Day is the interval of time between two successive transits of the sun over the same meridian; and the hour-angle of the sun is called Solar Time.
Page 428 - In the year 1899 there will be five eclipses, three of the Sun and two of the Moon. I. A partial eclipse of the Sun, Jauuary llth, visible in the Northern Pacific Ocean.
Page 546 - Semidiameter and the Sidereal Time of Semidiameter Passing Meridian are also given on page I. The Sun's semidiameter is used in reducing the altitude of the upper or lower limb of the Sun to the altitude of the center; and in reducing the angular distance...
Page 546 - Sun for that time, as last explained; and 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 time. Subtracting the reduced value from the given sidereal time, gives the interval of sidereal time from noon.
Page 430 - 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 550 - The places given are apparent positions, that is, they are referred to the equator and true equinox of the date, and are corrected for aberration. All the data except meridian passage are given for the instant of Greenwich mean noon. The column Meridian Passage shows the hour, minute and tenth of that passage of the planet over the meridian of Greenwich which occurs next after the noon of the date. The right ascension and declination of a planet are required whenever it is observed for time, latitude...
Page 544 - A sidereal day is the interval between two successive transits of the vernal equinox over the same meridian. It is 3...
Page 551 - Orbit contains the correction to be applied to the heliocentric longitudes in order to obtain the longitude counted along the orbit of the planet. This longitude is equal to the distance from the mean equinox to the node, plus the distance from the node to the planet. The heliocentric latitude is counted from the true ecliptic of the date The Logarithm of Radius Vector is the logarithm of the distance of the center of the planet from that of the Sun, at the Greenwich mean noon whose date is given...