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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Astronomy Reports</journal-id><journal-title-group><journal-title xml:lang="en">Astronomy Reports</journal-title><trans-title-group xml:lang="ru"><trans-title>Астрономический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0004-6299</issn><issn publication-format="electronic">3034-5170</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">688841</article-id><article-id pub-id-type="doi">10.31857/S0004629925050045</article-id><article-id pub-id-type="edn">PSBIJI</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">ON ESTIMATING THE MASSES OF THE COMPONENTS OF VISUAL BINARY SYSTEMS</article-title><trans-title-group xml:lang="ru"><trans-title>ОБ ОЦЕНКЕ МАСС КОМПОНЕНТОВ ВИЗУАЛЬНЫХ ДВОЙНЫХ СИСТЕМ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sytov</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Сытов</surname><given-names>A. Ю.</given-names></name></name-alternatives><email>sytov@inasan.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Malkov</surname><given-names>O. Yu.</given-names></name><name xml:lang="ru"><surname>Малков</surname><given-names>О. Ю.</given-names></name></name-alternatives><email>malkov@inasan.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Astronomy of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральное государственное бюджетное учреждение Российской академии наук Институт астрономии</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-05-15" publication-format="electronic"><day>15</day><month>05</month><year>2025</year></pub-date><volume>102</volume><issue>5</issue><issue-title xml:lang="en">VOL 102, NO5 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 102, №5 (2025)</issue-title><fpage>389</fpage><lpage>413</lpage><history><date date-type="received" iso-8601-date="2025-08-08"><day>08</day><month>08</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, The Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">The Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0004-6299/article/view/688841">https://journals.eco-vector.com/0004-6299/article/view/688841</self-uri><abstract xml:lang="en"><p>Determining the mass of a star is an important and complex process, possible only for the components of 2–3 hundred binary systems of certain observational classes. However, for thousands and tens of thousands of binaries of other observational classes, a simple and fast estimation of component masses is possible. In this paper, we propose a method for estimating the mass ratio of the components from the difference in their luminosity and the total mass of the system. The approbation of the technique on test sets of binaries with known component masses showed a good (at the level of 7%) agreement of the results. The technique can be applied to visual binary systems of the main sequence with known parallaxes and orbital elements. The approximating polynomials are presented in the paper as Fortran 90, C++, Pascal, and Python codes. The work is partially based on a talk presented at the Modern Stellar Astronomy 2024 conference.</p></abstract><trans-abstract xml:lang="ru"><p>Определение массы звезды — важный и сложный процесс, возможный только для компонентов 2–3 сотен двойных систем определенных наблюдательных классов. Однако для тысяч и десятков тысяч двойных других наблюдательных классов возможна простая и быстрая оценка масс компонентов. В данной работе предложена методика оценки отношения масс компонентов из разности значений их блеска и суммарной массы системы. Апробация методики на тестовых наборах двойных с известными массами компонентов показала неплохое (на уровне 7%) согласие результатов. Методика может быть применена к визуальным двойным системам главной последовательности с известными параллаксами и орбитальными элементами. Аппроксимирующие полиномы представлены в статье в виде программ на языках Fortran 90, C++, Pascal, Python. Статья частично основана на докладе, представленном на конференции "Современная звездная астрономия — 2024".</p></trans-abstract><kwd-group xml:lang="en"><kwd>visual binary stars</kwd><kwd>stellar masses</kwd><kwd>"mass-luminosity" relation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>визуальные двойные звезды</kwd><kwd>массы звезд</kwd><kwd>соотношение "масса-светимость"</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>D.M. Popper, Ann. Rev. Astron. Astrophys. 18, 115 (1980).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>P. Harmanec, Bull. Astron. Inst. Czechoslovakia 39, 329 (1988).</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>J. Andersen, Astron. and Astrophys. Rev. 3(2), 91 (1991).</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>O.Y. 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