{"title":"Photometry of Asteroid (65803) Didymos: Determination of the Rotation Period and Its Uncertainty","authors":"A. G. Safarov, S. N. Safarzoda, N. Kh. Minikulov","doi":"10.1134/S0038094626600228","DOIUrl":null,"url":null,"abstract":"<p>The paper presents the results of photometric observations of the near-Earth asteroid (65803) Didymos, conducted on the 70-cm AZT-8 telescope of the Hisar Astronomical Observatory of the Institute of Astrophysics of the National Academy of Sciences of Tajikistan over seven nights from August 29 to September 6, 2022. Using the Lomb–Scargle method, the asteroid’s rotation period was determined to be <i>P</i> = 2.3562 ± 0.0040 h. The uncertainty Δ<i>P</i> was estimated using three independent methods: Bootstrap (Monte Carlo), FWHM, and <i>Q-</i>factor. Analysis of the phase curve using a two-harmonic Fourier series confirms the double-humped shape of the light curve, characteristic of rotating irregularly shaped objects. The results are consistent with period estimates obtained before the DART space experiment and can be used for further modeling.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"60 :","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar System Research","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0038094626600228","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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Abstract
The paper presents the results of photometric observations of the near-Earth asteroid (65803) Didymos, conducted on the 70-cm AZT-8 telescope of the Hisar Astronomical Observatory of the Institute of Astrophysics of the National Academy of Sciences of Tajikistan over seven nights from August 29 to September 6, 2022. Using the Lomb–Scargle method, the asteroid’s rotation period was determined to be P = 2.3562 ± 0.0040 h. The uncertainty ΔP was estimated using three independent methods: Bootstrap (Monte Carlo), FWHM, and Q-factor. Analysis of the phase curve using a two-harmonic Fourier series confirms the double-humped shape of the light curve, characteristic of rotating irregularly shaped objects. The results are consistent with period estimates obtained before the DART space experiment and can be used for further modeling.
期刊介绍：
Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.
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