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Photometric observations of comet C/2017 K2 (PANSTARRS) with the Lijiang 2.4 m telescope
Zhang XL(张西亮)1,2,3; Jewitt, D.4,5; Hui, M. T.4
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-08-01
Volume487Issue:2Pages:2919-2923
DOI10.1093/mnras/stz1435
Contribution Rank第1完成单位
Indexed BySCI
Keywordcomets: individual: C/2017 K2 ( PANSTARRS) techniques: photometric
Abstract

Starting soon after discovery, we carried out a programme of continuous observations for the active comet C/2017 K2 (PANSTARRS) using the Lijiang 2.4 m telescope from 2017 September 8 to 2018 June 18 with a Johnson R filter. Three fixed linear apertures of ra1 = 6.4 x 104 km, ra2 = 7.7 x 104 km and ra3 = 9.6 x 104 km were chosen to measure the brightness of C/2017 K2 respectively, and the instrumental magnitudes were then converted into the PS1 r system. During the period of observation, the cross-section area increased at rates of 22.0, 28.5 and 44.1 km2 d(-1) relative to the different linear photometry apertures, and the corresponding mass-loss rates were 63.8 kg s(-1), 82.6 kg s(-1) and 127.5 kg s(-1), assuming that the dust-particle size is (a) over bar = 0.5 mm and the density is. = 500 kgm(3). The size of the C/2017 K2 nucleus is estimated as 1.2 less than or similar to rn less than or similar to 2.5 km for CO sublimation and 3.1 less than or similar to rn less than or similar to 183.9 km for CO2 with an aperture of 9.6 x 10(4) km; meanwhile the grain size of K2 is ac less than or similar to 9 mm for CO and a(c) less than or similar to 0.8 mm for CO2. The long-term monitoring data provided in this paper will be very valuable and helpful for studying the activity mechanism of C/2017 K2.

Funding ProjectCAS ; People's Government of Yunnan Province ; National Science Foundation of China (NSFC)[U1731122] ; National Science Foundation of China (NSFC)[11203070] ; National Science Foundation of China (NSFC)[U1431227] ; National Science Foundation of China (NSFC)[U1631124] ; National Science Foundation of China (NSFC)[11573067] ; CAS Key Laboratory of Planetary Sciences, Shanghai Astronomical Observatory/Purple Mountain Observatory, Chinese Academy of Sciences
Funding OrganizationCAS ; People's Government of Yunnan Province ; National Science Foundation of China (NSFC)[U1731122, 11203070, U1431227, U1631124, 11573067] ; CAS Key Laboratory of Planetary Sciences, Shanghai Astronomical Observatory/Purple Mountain Observatory, Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000474919700101
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCCD PHOTOMETRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/20570
Collection丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
Corresponding AuthorZhang XL(张西亮)
Affiliation1.Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.CAS Key Laboratory of Planetary Sciences, Nanjing 210008, China
4.Department of Earth, Planetary and Space Sciences, UCLA, 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095-1567, USA
5.Department of Physics and Astronomy, UCLA, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095-1547, USA
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang XL,Jewitt, D.,Hui, M. T.. Photometric observations of comet C/2017 K2 (PANSTARRS) with the Lijiang 2.4 m telescope[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,487(2):2919-2923.
APA Zhang XL,Jewitt, D.,&Hui, M. T..(2019).Photometric observations of comet C/2017 K2 (PANSTARRS) with the Lijiang 2.4 m telescope.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,487(2),2919-2923.
MLA Zhang XL,et al."Photometric observations of comet C/2017 K2 (PANSTARRS) with the Lijiang 2.4 m telescope".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 487.2(2019):2919-2923.
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