 H — \, taken without regard to sign, must be less than the semi-diurnal arc of the star by at least one hour. On very rare occasions an emersion might be seen in the east horizon, or an immersion in the west, when this difference is a few minutes less...  The American Ephemeris and Nautical Almanac - Page 718by United States Naval Observatory. Nautical Almanac Office - 1911Full view - About this book
 | United States. Congress. House - 1885 - 558 pages
...the star by at least one hour. On veiy rare occasions an emersion might be seen in the east horizon, or an immersion in the west, when this difference...than an hour. 3. The sun must not be much more than au hour above the horizon at the local mean time T — /., unless the star is bright enough to be seen... | |
 | Charles Leander Doolittle - 1885 - 666 pages
...star must be above the horizon. 3. The sun must be below the horizon, or at least not much above it, at the local mean time (T ' — A), unless the star is bright enough to be seen in the daytime. Remark I. If the place is near one of the limiting parallels of latitude an occultation may or may... | |
 | 1895 - 578 pages
...the star by at least one hour. On very rare occasions an emersion might be seen in the east horizon, or an immersion in the west, when this difference...than an hour above the horizon at the local mean time Т1— Л, unless the star is bright enough to be seen in the day time. The most convenient course... | |
 | 1898 - 580 pages
...the star by at least one hour. On very rare occasions an emersion might be seen in the east horizon, or an immersion in the west, when this difference...an hour above the horizon at the local mean time T — Л, unless the star is bright enough to be seen in the day time. The most convenient course will... | |
 | Roberdeau Buchanan - 1904 - 292 pages
...without regard to sign, must be less than the semidiurnal arc of the stars by at least one. hour. Upon very rare occasions an emersion might be seen in the...an hour above the horizon at the local mean time, T — / \_T — 0i], unless the star is bright enough to be seen in the daytime. Fig. 28 shows how unsatisfactory... | |
 | Roberdeau Buchanan - 1904 - 292 pages
...at least one hour. Upon very rare occasions an emersion might be seen in the east, or an immersiou in the west, when this difference is a few minutes...an hour above the horizon at the local mean time, T — ^ \_T — <o], unless the star is bright enough to be seen in the daytime. Fig. 28 shows how unsatisfactory... | |
 | United States Naval Observatory. Nautical Almanac Office - 1884 - 560 pages
...the star by at least one hour. On veiy rare occasions nit emersion might be seen in the east horizon, or an immersion in the west, when this difference...is a few minutes less than an hour. 3. The sun must nos be much m ‘re thati an hour above the horizon at the local mean time T — 2, unle¿s the star... | |
 | United States Naval Observatory. Nautical Almanac Office - 1891 - 574 pages
...minutes less than aim hour. 3. Time smut must not be mucim more than an imour above time horizon at time local mean time T— A, unless the star is bright enough to be seen iii time day time. ‘Fime most convenient course will be to write the value of — A on time bottom... | |
 | United States Naval Observatory. Nautical Almanac Office - 1890 - 558 pages
...the star by at least one hour. On very rare occasions an emersion might be seen in the east horizon, or an immersion in the west, when this difference...hour above the horizon at the local mean time T— I, unless the star is bright enough to be seen in ihe day time. The most »onvenient course will be... | |
| |
