Cinematography of partial solar eclipses. III. Analysis of the observations made at Mombasa, 1948 November 1
Abstract
The observations at Mombasa were the first to be made by this method. The paper describes the method of measuring the photographs, and of determining the zero of P.A. `5; the method of correcting the P.A. `5 for the effects of lunar irregularities; the derivation of suitable normal equations; and a number of systematic corrections which should in principle be considered in all eclipse work. The interactions between the Washington limbtraces (which were used to derive the limbeffects) and the eclipse results are discussed, and a direct check on the difference between the mean P.A. system of the two traces used, and that of the eclipse, gave 0 03010 018. The "geodetic" probable errors of the result correspond to t 34 metres and I 45 metres in the two directions parallel to the fundamental plane, or to I 0" 0I9 in o' cos and I 0" 025 in , for (roughly) the difference between the Moon's place and the Sun's. The probable error of the Moon's mean longitude is much larger (I 0 064), owing to the uncertainty in that of the Sun. There are in the present case several known sources of possible systematic error, but they appear quite capable of elimination in future work.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 1955
 DOI:
 10.1093/mnras/115.1.60
 Bibcode:
 1955MNRAS.115...60A