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Photometric analysis for the slow rotating asteroid (103) Hera using convex inversion and Lommel-Seeliger ellipsoid methods
Wang A(王翱)1,2,3; Wang XB(王晓彬)1,2,3; Muinonen, Karri4,5; Han, Xianming L.6
Source PublicationPLANETARY AND SPACE SCIENCE
2019-03-01
Volume167Pages:17-22
DOI10.1016/j.pss.2019.01.007
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordEllipsoid Convex shape Lightcurve inversion Asteroid
Abstract

The shapes and rotational states of main-belt asteroids are important for understanding their formation and evolution. Available photometric data of asteroids are biased due to selection effects, including the relative paucity of analyses of slowly rotating objects. In order to get photometric data of slowly rotating asteroids, an international joint observation project has been carried out since 2015 using Chinese and SARA (Southeastern Association for Research in Astronomy) telescopes. In this paper, the photometric data of one of this project targets - (103) Hera were analyzed using the convex inversion method and Lommel-Seeliger ellipsoid model. Combining existing and new photometric data, we re-calculated the shape and spin parameters for (103) Hera. Using a convex shape method, a pair of poles are derived for (103) Hera - (83.0 degrees, 39.0 degrees) and (269 degrees, 56.8 degrees) in ecliptic frame. The spin periods corresponding to these poles are very close - 23.74264 h and 23.74267 h respectively. Meanwhile, the same data were analyzed using the Lommel-Seeliger ellipsoid inversion method and a pair of pole solutions - (74.1 degrees, 39.0 degrees) and (263.1 degrees, 51.0 degrees) with a spin period of 23.74262 h and 23.74263 h respectively are derived. Based on the derived shape of (103) Hera, we have fitted the H, G(1), G(2) phase function using the calibrated data after removing effects of aspheric shape. As a result, we estimated its absolute magnitude H = 8.92 mag with two phase function parameters G(1) = 0.13 and G(2) = 0.45.

Funding ProjectNational Natural Science Foundation of China[11073051] ; National Natural Science Foundation of China[11673063]
Funding OrganizationNational Natural Science Foundation of China[11073051, 11673063]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 行星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Publication PlaceTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN0032-0633
URL查看原文
WOS IDWOS:000459839500003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIGHTCURVE INVERSION ; OPTIMIZATION METHODS ; PHASE FUNCTION ; PARAMETERS ; G(1)
EI Accession Number20190606474525
EI KeywordsPhotometry
EI Classification Number408.2structural Members And Shapes - 657.2extraterrestrial Physics And Stellar Phenomena - 941.4optical Variables Measurements
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18834
Collection系外行星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorWang XB(王晓彬)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming; 650216, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming; 650216, China
3.University of Chinese Academy of Sciences, Beijing; 100049, China
4.Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, P.O. Box 64, Helsinki; FI-00014 U, Finland
5.Finnish Geospatial Research Institute, Geodeetinrinne 2, Masala; FI-02430, Finland
6.Department of Physics and Astronomy, Butler University, Indianapolis; IN; 46208, United States
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang A,Wang XB,Muinonen, Karri,et al. Photometric analysis for the slow rotating asteroid (103) Hera using convex inversion and Lommel-Seeliger ellipsoid methods[J]. PLANETARY AND SPACE SCIENCE,2019,167:17-22.
APA Wang A,Wang XB,Muinonen, Karri,&Han, Xianming L..(2019).Photometric analysis for the slow rotating asteroid (103) Hera using convex inversion and Lommel-Seeliger ellipsoid methods.PLANETARY AND SPACE SCIENCE,167,17-22.
MLA Wang A,et al."Photometric analysis for the slow rotating asteroid (103) Hera using convex inversion and Lommel-Seeliger ellipsoid methods".PLANETARY AND SPACE SCIENCE 167(2019):17-22.
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