The orbit of Triton with new precise observations and the INPOP19a ephemeris

doi:10.1051/0004-6361/202038556

NTSC-IR

	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
发表期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
卷号	641 页码:7
摘要	Aims. 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.
关键词	astrometry celestial mechanics ephemerides planets and satellites: individual: Neptune planets and satellites: individual: Triton
资助者	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 ; 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
DOI	10.1051/0004-6361/202038556
关键词[WOS]	ASTROMETRIC OBSERVATIONS ; OUTER PLANETS ; FASTT OBSERVATIONS ; CCD POSITIONS ; SATELLITES ; NEREID ; MOTION ; POLE
语种	英语
资助项目	National Natural Science Foundation of China[11803019] ; National Natural Science Foundation of China[11703007] ; Scientific research project of Shanghai Science and Technology Commission[19DZ1100500]
资助者	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 ; 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研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000573867400001
出版者	EDP SCIENCES S A
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/12054
专题	中国科学院国家授时中心
通讯作者	Tang, K.
作者单位	1.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
推荐引用方式 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.