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The orbits of outer planetary satellites using the Gaia dataстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Emelyanov N.V., Kovalev M.Yu, Varfolomeev M.I.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 522
- Год издания: 2023
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 165
- Последняя страница: 172
- DOI: 10.1093/mnras/stad958
- Аннотация: Launch of the Gaia space observatory started a new era in astrometry when the accuracy of star coordinates increased bythousands of times. Significant improvement in accuracy was also expected for the coordinates of the Solar system bodies.Gaia Data Release 3 (DR3) provided us with the data that could be used to test our expectations. In this work, we refinethe orbits of a number of outer planetary satellites using both ground-based and Gaia observations. From 13 outer satellitesobserved by Gaia, we chose 6 to obtain their orbits. Some specific moments in using observations of outer satellites made byGaia are demonstrated. These peculiarities stem from scanning motion of Gaia, in particular from the fact that the accuracyof observations is significantly different along and across the scanning direction. As expected, Gaia observations proved to bemore precise than those made from Earth, which results in more accurate satellite ephemerides. We estimate accuracy of theephemerides of considered satellites for the interval between 1996 and 2030. As astrometric positions published in Gaia DR3were not corrected for the relativistic light deflection by the Sun, we took into account this effect, which slightly diminished therms residuals. In addition, relativistic light deflection by the giant planets was estimated, which, as it turned out, can be neglectedwith the given accuracy of Gaia observations
- Добавил в систему: Емельянов Николай Владимирович