New Positions of Triton Based on Gaia DR2 and New Image-processing Methods

doi:10.3847/1538-3881/abf121

	New Positions of Triton Based on Gaia DR2 and New Image-processing Methods
	Zhang, H. Y.1; Qiao, R. C.2; Yu, Y.3,4; Yan, D.5; Tang, K.3
刊名	ASTRONOMICAL JOURNAL
	2021-05-01
卷号	161 期号:5 页码:8
ISSN号	0004-6256
DOI	10.3847/1538-3881/abf121
英文摘要	The large time span and precise observational data of natural satellites is of great significance for updating their ephemerides and studying their dynamic characteristics. With the help of the new image-processing methods and the Gaia DR2 catalog, all CCD images of Triton taken with the 1.56 m telescope of Shanghai Astronomical Observatory during 2005-2009 were reanalyzed. The median filtering algorithm is used for image preprocessing to remove the influence of the halo of Neptune, and an upgraded modified moment, called the intensity-square-weighted centroiding method, is applied to determine the centroids of the stars and Triton. A total of 2299 positions of Triton were obtained, including 263 new observed positions and 2036 updated observed positions. Such five-year time span data with high precision will be very helpful to improve the orbit parameters of Triton.
资助项目	National Science Foundation of China[11803019] ; National Science Foundation of China[12073062] ; National Science Foundation of China[11703007]
WOS关键词	ASTROMETRIC OBSERVATIONS ; NEPTUNIAN SATELLITES ; REREDUCTION ; POLE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000645145200001
资助机构	National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/10727]
专题	中国科学院国家授时中心
通讯作者	Zhang, H. Y.
作者单位	1.Shanghai Univ Engn Sci, Sch Math Phys & Stat, 333 Long Teng Rd, Shanghai 201620, Peoples R China 2.Chinese Acad Sci, Natl Time Serv Ctr, 3 East Shuyuan Rd, Lintong 710600, Shaanxi, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, 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	Zhang, H. Y.,Qiao, R. C.,Yu, Y.,et al. New Positions of Triton Based on Gaia DR2 and New Image-processing Methods[J]. ASTRONOMICAL JOURNAL,2021,161(5):8.
APA	Zhang, H. Y.,Qiao, R. C.,Yu, Y.,Yan, D.,&Tang, K..(2021).New Positions of Triton Based on Gaia DR2 and New Image-processing Methods.ASTRONOMICAL JOURNAL,161(5),8.
MLA	Zhang, H. Y.,et al."New Positions of Triton Based on Gaia DR2 and New Image-processing Methods".ASTRONOMICAL JOURNAL 161.5(2021):8.