Abstract
Pulkovo astrometric observations began in the 1840s using the Repsold transit instrument in the prime vertical and Ertel vertical circle. The first observers on these instruments were W.I. Struve, 1840–1856, and Kh.I. Peters, 1842–1849. In the present work, we collected and analyzed different series of latitude variations from observations made by M.O. Nuren, B. Wanach, A.A. Ivanov, I.N. Bonsdorf, and A.Ya. Orlov. In addition, results are given of investigations of a specific behavior of the Chandler polar motion in this interval, obtained by C. Chandler, Ivanov, Kh. Kimura, Orlov, and N. Sekiguchi. The aim of this paper is to search for and analyze the earliest series of Pulkovo latitudes, in order to evaluate the possibility of their use to study the motion of the pole at the maximum available range of observations. Different methods were used to isolate and analyze the sum of Chandler and annual latitude variations. The annex provides a series of Pulkovo latitude variations for 1840–1848, which may be used to extend latitude variation back to 1840.
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Original Russian Text © N.O. Miller, E.Ya. Prudnikova, 2011, published in Kinematika i Fizika Nebesnykh Tel, 2011, Vol. 27, No. 1, pp. 40–52.
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Miller, N.O., Prudnikova, E.Y. Early latitude observations at the Pulkovo observatory. Kinemat. Phys. Celest. Bodies 27, 30–37 (2011). https://doi.org/10.3103/S0884591311010065
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DOI: https://doi.org/10.3103/S0884591311010065