Lectures on Practical Astronomy and Astronomical Instruments (1879)
Challis, James Rev. · Deighton, Bell and Co. (Cambridge) · leaf 315
ential observations are much used for determining initial places of newly discovered planets and comets. IV. FINAL CALCULATION OF RIGHT ASCENSIONS AND POLAR DISTANCES FROM EQUATORIAL OBSERVATIONS. 286. After getting rid, as accurately as possible, of all effects of instrumental errors by the… … Formule for calculating the corrections for refraction in tnde- pendent observations may be obtained as follows by reference to Figure 47 (1). Z is the zenith, P the pole of the heavens, S the place of object, PS its true polar distance, and ZQ is an
Book · Astronomy
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