Text-book on Practical AstronomyJ. Wiley & sons, 1910 - 205 pages |
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Page vi
... EPHEMERIS AND NAUTICAL ALMANAC · STAR CATALOGUES - INTERPOLATION 38. The Ephemeris . . 39. Star Catalogues . 40. Interpolation . 62 69 69 ART . CHAPTER VII THE EARTH'S FIGURE CORRECTIONS TO OBSERVED vi TABLE OF CONTENTS.
... EPHEMERIS AND NAUTICAL ALMANAC · STAR CATALOGUES - INTERPOLATION 38. The Ephemeris . . 39. Star Catalogues . 40. Interpolation . 62 69 69 ART . CHAPTER VII THE EARTH'S FIGURE CORRECTIONS TO OBSERVED vi TABLE OF CONTENTS.
Page 61
... ° W. ? If the right ascension of the mean sun at G. M. N. is 18h 41m or3.6 , what is the local sidereal time ? What is the Greenwich Sidereal Time ? CHAPTER VI THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC - STAR MEASUREMENT OF TIME 61.
... ° W. ? If the right ascension of the mean sun at G. M. N. is 18h 41m or3.6 , what is the local sidereal time ? What is the Greenwich Sidereal Time ? CHAPTER VI THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC - STAR MEASUREMENT OF TIME 61.
Page 62
... Ephemeris . In the problems previously discussed it has been assumed that the coördinates of celestial objects and various other data men- tioned are known to ... EPHEMERIS AND NAUTICAL ALMANAC · STAR CATALOGUES - INTERPOLATION The Ephemeris.
... Ephemeris . In the problems previously discussed it has been assumed that the coördinates of celestial objects and various other data men- tioned are known to ... EPHEMERIS AND NAUTICAL ALMANAC · STAR CATALOGUES - INTERPOLATION The Ephemeris.
Page 63
... rapidity with which the semidiameter and parallax vary , they are given for both Green- wich noon and midnight . The next eight pages contain the Day of the week . Day of the month . THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC 63.
... rapidity with which the semidiameter and parallax vary , they are given for both Green- wich noon and midnight . The next eight pages contain the Day of the week . Day of the month . THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC 63.
Page 65
... declination indicates that south declinations are decreasing . parent noon . Diff . for I Hour , +9.8565 . ( Table III . ) MEAN PLACES OF STARS , 1912 . WASHINGTON , JANUARY THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC 65 80.
... declination indicates that south declinations are decreasing . parent noon . Diff . for I Hour , +9.8565 . ( Table III . ) MEAN PLACES OF STARS , 1912 . WASHINGTON , JANUARY THE AMERICAN EPHEMERIS AND NAUTICAL ALMANAC 65 80.
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Common terms and phrases
accurate apparent approximate astronomical astronomical transit azimuth Cassiopeia celestial sphere centre Ceti chronometer circumpolar stars computed constellations coördinates Corr culmination Decl declination determined Diff earth east ecliptic elongation engineer's transit Engineering Ephemeris Equa equal altitudes equator equinox error Example formula given Greenwich Mean Greenwich Mean Noon horizontal angle horizontal axis horizontal cross hair hour angle hour circle hourly change index correction instant instrument interval Large 12mo latitude line of sight longitude lower limb mean solar mean sun measured meridian altitude method moon moon's motion Nautical Almanac nearly necessary Observed altitude obtained orbit parallax plane polar distance Polaris pole position refraction correction result right ascension sec h semidiameter sidereal day sight line sin Po spirit level star's subtracting sun's surface surveyor Table tangent telescope tide tion true tude vernier vertical arc vertical axis vertical circle vertical cross hair watch correction zenith distance ΙΟ