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The orbit of Triton with new precise observations and the INPOP19a ephemeris
Tang, K.1; Song, Y. Z.1; Shen, K. X.2; Qiao, R. C.2; Tang, Z. H.1,3; Yu, Y.1,3; Zhang, H. Y.4; Yan, D.5
2020-09-16
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume641Pages:7
AbstractAims. The Gaia catalogue brings new opportunities and challenges to high-precision astronomy and astrometry. The precision of data reduction is therefore improved by a large number of reference stars with high-precision positions and proper motions. Numerous precise positions for Triton are obtained from the latest observations using the Gaia catalogue. Furthermore, the new INPOP19a planetary ephemeris, which also fits the observations from the Gaia Data Release 2, has recently become available. In this paper, a new orbit of Triton is calculated using the latest precise charge-coupled device (CCD) observations and the INPOP19a ephemeris.Methods. Triton's orbital solution is calculated using a numerical integrator, while the orientation of Neptune's pole in particular is obtained by integrating the simplified Euler's equations of motion. We determine the orbit of Triton over 170 yr based on 11 040 Earth-based observations made between 1847 and 2016 and on Voyager 2 data. The positions of the Sun and planets are provided by the INPOP19a ephemeris. We compare our results to those from other previous works to check the influences on Triton's orbit from different planetary ephemerides.Results. A new orbit of Triton is provided here. The root-mean-square of the residuals for the Earth-based CCD absolute observations are 0.102 '' in right ascension and 0.142 '' in declination. Although most different planetary ephemerides have large differences in Neptune's position, the orbits of Triton using different planetary ephemerides are still close, under similar dynamical models. The Voyager 2 data add a constraint on Triton's orbit here.
Keywordastrometry celestial mechanics ephemerides planets and satellites: individual: Neptune planets and satellites: individual: Triton
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission
DOI10.1051/0004-6361/202038556
WOS KeywordASTROMETRIC OBSERVATIONS ; OUTER PLANETS ; FASTT OBSERVATIONS ; CCD POSITIONS ; SATELLITES ; NEREID ; MOTION ; POLE
Language英语
Funding ProjectNational Natural Science Foundation of China[11803019] ; National Natural Science Foundation of China[11703007] ; Scientific research project of Shanghai Science and Technology Commission[19DZ1100500]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Scientific research project of Shanghai Science and Technology Commission ; Scientific research project of Shanghai Science and Technology Commission
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000573867400001
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81638
Collection中国科学院国家天文台
Corresponding AuthorTang, K.
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Natl Time Serv Ctr, 3 East Shuyuan Rd, Lintong 710600, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Shanghai Univ Engn Sci, Sch Fundamental Studies, 333 Long Teng Rd, Shanghai 201620, Peoples R China
5.Huanggang Normal Univ, Sch Phys & Elect Informat, 146 Xingang Second Rd, Huanggang 438000, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Tang, K.,Song, Y. Z.,Shen, K. X.,et al. The orbit of Triton with new precise observations and the INPOP19a ephemeris[J]. ASTRONOMY & ASTROPHYSICS,2020,641:7.
APA Tang, K..,Song, Y. Z..,Shen, K. X..,Qiao, R. C..,Tang, Z. H..,...&Yan, D..(2020).The orbit of Triton with new precise observations and the INPOP19a ephemeris.ASTRONOMY & ASTROPHYSICS,641,7.
MLA Tang, K.,et al."The orbit of Triton with new precise observations and the INPOP19a ephemeris".ASTRONOMY & ASTROPHYSICS 641(2020):7.
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