New astrometric positions of the Jovian irregular satellites Elara and Pasiphae in 2016-2018

doi:10.1016/j.icarus.2019.113445

	New astrometric positions of the Jovian irregular satellites Elara and Pasiphae in 2016-2018
	Yan, D.1; Qiao, R. C.2; Yu, Y.3,4; Cheng, X.2; Zhang, H. Y.5; Xi, X. J.2; Tang, K.3; Lan, Z. G.1
	2020-02-01
发表期刊	ICARUS
ISSN	0019-1035
卷号	337 页码:6
摘要	A total of 372 astrometric positions of Jovian irregular satellites Elara and Pasiphae were obtained during three successive oppositions in 2016, 2017, and 2018, by 1 m telescope at Yunnan Observatory. Based on Gaia DR2 catalogue, 196 new positions of Elara and 176 new positions of Pasiphae were collected. We compared our observations to the theoretical positions retrieved from IMCCE ephemeris online service with satellite ephemeris of Emelyanov model and planetary ephemeris DE431. For Elara, in each direction, the mean (O-C) is better than -0.004 arcsec and the dispersion is no more than 0.063 arcsec. For Pasiphae, in each direction, the mean (O-C) is better than -0.045 arcsec and the dispersion is no more than 0.082 arcsec. Our new observations have a smaller dispersion than previous observations. Moreover, we also compared two recent orbit models of each satellite as well as three different planetary ephemerides of Jupiter. These comparisons show that the differences among all the three planetary ephemerides are small.
关键词	Astrometry Jupiter, satellites Irregular satellites
资助者	National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.icarus.2019.113445
关键词[WOS]	EPHEMERIDES
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[11573029] ; National Natural Science Foundation of China (NSFC)[11703007] ; National Natural Science Foundation of China (NSFC)[11603029]
资助者	National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC)
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000503914400012
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/9685
专题	高精度时间传递与精密测定轨研究室
通讯作者	Yan, D.
作者单位	1.Huanggang Normal Univ, Sch Phys & Elect Informat, Huanggang 438000, Peoples R China 2.Chinese Acad Sci, Natl Time Serv Ctr, Lintong 710600, Shaanxi, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 5.Shanghai Univ Engn Sci, Sch Fundamental Studies, Shanghai 201620, Peoples R China
推荐引用方式 GB/T 7714	Yan, D.,Qiao, R. C.,Yu, Y.,et al. New astrometric positions of the Jovian irregular satellites Elara and Pasiphae in 2016-2018[J]. ICARUS,2020,337:6.
APA	Yan, D..,Qiao, R. C..,Yu, Y..,Cheng, X..,Zhang, H. Y..,...&Lan, Z. G..(2020).New astrometric positions of the Jovian irregular satellites Elara and Pasiphae in 2016-2018.ICARUS,337,6.
MLA	Yan, D.,et al."New astrometric positions of the Jovian irregular satellites Elara and Pasiphae in 2016-2018".ICARUS 337(2020):6.