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

doi:10.1051/0004-6361/202038556

	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
刊名	ASTRONOMY & ASTROPHYSICS
	2020-09-16
卷号	641 页码:7
关键词	astrometry celestial mechanics ephemerides planets and satellites: individual: Neptune planets and satellites: individual: Triton
ISSN号	0004-6361
DOI	10.1051/0004-6361/202038556
英文摘要	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.
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]
WOS关键词	ASTROMETRIC OBSERVATIONS ; OUTER PLANETS ; FASTT OBSERVATIONS ; CCD POSITIONS ; SATELLITES ; NEREID ; MOTION ; POLE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000573867400001
资助机构	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
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/12053]
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.