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Impact and Major Contributions
Ukrainian theoretical astronomer Olexiy Razdolsky worked in the field of dynamical astronomy and specialized in determining and improving the orbital elements of asteroids by taking into account planetary perturbations. Most important were Razdolsky’s works that focused on the construction of his own analytical theory for the motion of asteroids of the (Р+ 1)/Рtype using the methods of Henri Poincare. He investigated effects of the eccentricity of Jupiter’s orbit by applying variable equations. Also widely known are Razdolsky’s works in determining the orbits of the Trojan asteroids (minor planets of the Jupiter group whose own orbits lie 60° ahead of, or behind, that of Jupiter itself) that involve solutions to the so-called three-body problem (Balyshev 2020, 2022) (Fig. 1).
Razdolsky, Olexiy, from the collection of glass plates of the Kharkiv Astronomical Observatory (now the Institute of Astronomy)....
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References
Balyshev, Marat. 2020. Professor Oleksiy Ivanovich Razdolsky (1877–1942), a Ukrainian theoretical astronomer: Scientific biography. (in Ukrainian). Nauka i naukoznavstvo 3: 92–115. https://doi.org/10.15407/sofs2020.03.092.
———. 2022. Astronomical research in Kharkiv at the end of the 19th century – The first half of the 20th century. (in Ukrainian). Kyiv: Naukova Dumka. https://doi.org/10.15407/978-966-00-1863-1
Rasdolsky, Olexiy. 1925. Application of elliptic functions to the solution of the basic geodesic problem. (in Russian). Russkii astronomicheskii zhurnal 2: 77–88.
———. 1926. Über die Berechnung periodischer Losungen. (in German). Astronomische Nachrichten 227: 315–318.
———. 1927. The theory of minor planets of the Jupiter group. (in Russian). Russkii astronomicheskii zhurnal 4: 204–224.
———. 1929. Theorie der kleinen Planeten vom Typus (P + 2)/P. (in German). Arkiv för matematik, astronomi och fysik 21: 1–28.
———. 1931a. About the movement of the minor planet 55 Pandora. (in Ukrainian). Publications of the Kharkiv Astronomical Observatory 3: 63–65.
———. 1931b. Bestimmung einer mittleren Ellipse für den Planeten 472 Roma mit Berücksichtigung der Störungen (in German). Astronomische Nachrichten 244: 7–10.
———. 1931c. Calculation of the average ellipse of the 787 Moskva orbit by taking into account the perturbations. (in Russian). Astronomicheskii Zhurnal 8: 75–78.
———. 1934. Sur l’Orbite periodique de la Planete Nestor. (in French). Journal des Observateurs 17: 97–101.
———. 1935a. Minor planet 51 Nemausa. (in Russian). Publikacii Kharkovskoi astronomicheskoi observatorii 5: 103–108.
———. 1935b. On the orbits of characteristic planets in moving fields. (in Ukrainian). Publikacii Kharkovskoi astronomicheskoi observatorii 5: 97–102.
———. 1936. On the application of a rotating field to the orbits of characteristic minor planets. (in Ukrainian). Naukovi zapiski Kharkivskogo derzhavnogo universitetu 6–7: 55–66.
———. 1938a. Application of the rotational field to the canonical solution of the problem of the perturbed elliptical motion of minor planets. (in Ukrainian). Publikacii Kharkovskoi astronomicheskoi observatorii 6: 25–40.
———. 1938b. About the orbit of a planet in the gravitational field of the Sun. (in Ukrainian). Publikacii Kharkovskoi astronomicheskoi observatorii 6: 41–46.
———. 1941. On the application of the canonical elements of Delaunay. (in Ukrainian). Naukovi zapiski Kharkivskogo derzhavnogo universitetu 23: 101–103.
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Balyshev, M.A. (2023). Razdolsky, Olexiy Ivanovich. In: Nicholson, P.D., Bartlett, J.L. (eds) Biographical Encyclopedia of Astronomers. Springer, New York, NY. https://doi.org/10.1007/978-1-0716-0738-1_101036-1
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