 | William Culley Bergen - 1872 - 688 pages
...Astronomical Time begins at noon and ends at the following noon ; it is counted from 0 hours to 24 hours. 39. Sidereal Time is the hour angle of the first point of Aries ; it is equal to the right ascension of the meridian. 40. Mean Time is the hour angle of the mean sun.... | |
 | William Culley Bergen - 1875 - 182 pages
...HNO. , Def. 38. Fig. 6. Astronomical Time begins when the sun is on the upper meridian HZO. 89. — Sidereal Time is the hour angle of the first point of Aries. 40. — Mean time is the hour angle of the mean sun. 41. — Apparent Time is the hour angle of the... | |
 | John Clement Primrose Aldous - 1887 - 70 pages
...Angle of the mean sun. The Equation of Time is the difference between the apparent and mean times. Sidereal Time is the Hour Angle of the First Point of Aries. Apparent Solar Day. An Apparent Solar Day is the interval of time between two successive transits of... | |
 | William Robert Martin - 1899 - 474 pages
...hour angle of the mean sun. The equation of time is the difference between apparent and mean time. Sidereal time is the hour angle of the first point of Aries. An apparent solar day is the interval of time between two successive transits of the sun over the same... | |
 | Frank Cole Stebbing - 1903 - 364 pages
...found in the column headed " Sidereal Time " on page II. of each month in the Nautical Almanac. Since sidereal time is the hour angle of the first point of Aries, or the right ascension of the meridian when the mean sun is on the meridian of Greenwich, the mean... | |
 | Nathaniel Bowditch - 1906 - 670 pages
...direction of ita application may be found for any moment from the Nautical Almanac. 276. SIDEREAL TIME. — Sidereal Time is th'e hour angle of the First Point of Aries. This point, which is identical with the vernal equinox, is the origin of all coordinates of right ascension.... | |
 | 1917 - 1082 pages
...A is the first point of Aries. AS is the right ascension of S. (Figure 24.) Figure 24 Sidereal Time Sidereal time is the hour angle of the first point of Aries. This point, which is identical with the vernal equinox, is the origin of all co-ordinates and does... | |
 | Nathaniel Bowditch - 1916 - 912 pages
...direction of its application may be found for any moment from the Nautical Almanac. 276. SIDEREAL TIME. — Sidereal Time is the hour angle of the First Point of Aries. This point, which is identical with the vernal equinox, is the origin of all coordinates of right ascension.... | |
 | Thomas Fleming Day - 1916 - 666 pages
...ordinarilv want in a day's work. '* * * Editor of THE RUDDER: WHAT is sidereal time? New York. TM O'BRIEN. Sidereal time is the hour angle of the first point of Aries, the origin of all co-ordinates of Right Ascension. A Sidereal Day is the interval between two successive... | |
 | Henry Libby Thompson - 1916 - 88 pages
...the First Point of Aries. Equation of Time — '• The difference between apparent and mean time. Sidereal Time — Is the hour angle of the First Point of Aries. Astronomical Time — Commences at noon of the civil day of the same date, is reckoned from 0 h. to... | |
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Sun increased by 12h; sidereal time is the hour angle of the First Point of Aries. 
