7 Equalization of the measurements of the altitude, the azimuth and the time from observation of passages of celestial bodies

The variable zri is measured and burdened with refraction, and zi already corrected for the value of refraction.

The approximating equation is described by horizontal coordinates zP (zenith distance) and aP (azimuth) of the center P of circle along which body moves, with its radius r equal in first approximation of its polar distance

and by horizontal coordinates zG and aG and time tG of indicated point PG on this circle (Fig. 1). The point P should theoretically agree with the pole which is nearest to the celestial body. Additional parameters of which values are known these are a declination δ of celestial body and an angle speed of change of right ascension vmax equal 7,29212E-05 radian for a second result from rotation of the Earth.