{"title":"Accuracy of Methods for Estimating the Age of Pairs of Trans-Neptunian Objects in Close Orbits","authors":"V. D. Gusev, E. D. Kuznetsov","doi":"10.1134/S0038094624601026","DOIUrl":null,"url":null,"abstract":"<p>Methods for estimating the age of pairs of trans-Neptunian objects were studied: analysis of convergence of lines of nodes and lines of apsides, and analysis of minima of the Kholshevnikov metric. A simulation of the probabilistic evolution of model pairs of trans-Neptunian objects aged 1 Myr and 10 Myr was performed. The errors in determining the age of pairs were obtained with different accuracy of orbit determination. About 10% of trans-Neptunian objects have orbital accuracy sufficient to estimate the age of pairs at intervals of 2 and 15 Myr. The error in age determination can reach 0.7 Myr in the 2-Myr interval and 4.5 Myr in the 15‑Myr interval. For about 50% of trans-Neptunian objects whose orbits are determined with typical accuracy, with a pair age of 10 Myr, the age estimate error can be comparable to the determined value. Applying the methods to the remaining fraction of trans-Neptunian objects whose orbits are determined with low accuracy may yield unreliable results, and the error may exceed the determined value.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2025-01-31","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/S0038094624601026","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
Methods for estimating the age of pairs of trans-Neptunian objects were studied: analysis of convergence of lines of nodes and lines of apsides, and analysis of minima of the Kholshevnikov metric. A simulation of the probabilistic evolution of model pairs of trans-Neptunian objects aged 1 Myr and 10 Myr was performed. The errors in determining the age of pairs were obtained with different accuracy of orbit determination. About 10% of trans-Neptunian objects have orbital accuracy sufficient to estimate the age of pairs at intervals of 2 and 15 Myr. The error in age determination can reach 0.7 Myr in the 2-Myr interval and 4.5 Myr in the 15‑Myr interval. For about 50% of trans-Neptunian objects whose orbits are determined with typical accuracy, with a pair age of 10 Myr, the age estimate error can be comparable to the determined value. Applying the methods to the remaining fraction of trans-Neptunian objects whose orbits are determined with low accuracy may yield unreliable results, and the error may exceed the determined value.
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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