1004 Belopolskya
asteroid

Belopolskya (minor planet designation: 1004 Belopolskya), provisional designation 1923 OS, is a dark Cybele asteroid from the outermost region of the asteroid belt, approximately 75 kilometers (47 mi) in diameter. It was named for Russian astrophysicist Aristarkh Belopolsky.
Discovery
Belopolskya was discovered on 5 September 1923, by Russian astronomer Sergey Belyavsky at Simeiz Observatory on the Crimean peninsula. Eight nights later, the body was independently discovered by Karl Reinmuth at Heidelberg in Germany.
It was first identified as A917 TA at Simeiz in 1917. The body's observation arc begins with the above-mentioned Heidelberg-observation following its official discovery.
Classification and orbit
Belopolskya orbits the Sun at a distance of 3.1–3.7 AU once every 6 years and 3 months (2,292 days). Its orbit has an eccentricity of 0.09 and an inclination of 3° with respect to the ecliptic. With these orbital parameters, it belongs to the Cybele asteroids, a dynamical group named after one of the largest asteroids, 65 Cybele.
Physical characteristics
Belopolskya is classified as a PF-type asteroid in the Tholen taxonomy, a subtype of the dark and reddish P-type asteroids.
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The subject matters to the general reference register because the source frames it as asteroid. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 5, 2026. The linked authority identifier is Q11531. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1004, 1923 and 1917.
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This entry incorporates text from “1004 Belopolskya” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.