 | Frederick Walter Simms - Astronomical instruments - 1834 - 124 pages
...between the two observations, will differ from the time which should elapse according to the catalogue, by the sum of the effects of the deviation upon the two stars. Compute what effect a deviation of 15" will produce on the interval, then the difference between the... | |
 | Benjamin Peirce - Plane trigonometry - 1845 - 498 pages
...149.] This method of determining the meridian is by means of two known circumpolar stars, which diner nearly 12 hours in right ascension. The upper passage...formula gives for the time of describing the arc SM Т . 15° = a cos. (p -f- L) cosec. p, or Т = T\ a cos. (p -f- L) cosec. p ; (395) Table C. [B. p.... | |
 | Nautical astronomy - 1880 - 880 pages
...between the two observations, will differ from the time which would elapse according to the catalogue, by the sum of the effects of the deviation upon the two stars. We have given, in Table C, at the end of this article, the corrections in the times of the upper and... | |
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... any deviation in the plane of the instrument from the meridian, will evidently produce contrary effects upon the observed times of transit, exactly as in the upper and lower transits of the same star. The time, which elapses between the two observations,... 