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题名: Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu
作者: Yu LiangLiang(余亮亮)1; Ji JiangHui(季江徽)1
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2015-09-01
卷号: 452, 期号:1, 页码:368-375
关键词: radiation mechanisms: thermal ; minor planets, asteroids: individual: (101955) Bennu ; infrared: general
学科分类: 天文和天体物理
DOI: 10.1093/mnras/stv1270
文章类型: Article
英文摘要: In this work, we investigate the thermophysical properties of OSIRIS-REx target asteroid (101955) Bennu (hereafter Bennu), where thermal inertia plays an important role in understanding the nature of the asteroid's surface, and will definitely provide substantial information for the sampling return mission. Using a thermophysical model incorporating, the recently updated 3D radar-derived shape model and mid-infrared observations of Spitzer-PUI, Spitzer-IRAC, Herschel/PACS and ESO VLT/VISIR, we derive the surface thermophysical properties of Bennu. The asteroid has an effective diameter of 510(-40)(+6) m, a geometry albedo of 0.047(-0.0011)(+0.0083), a roughness fraction of 0.04(-0.04)(+0.26) and thermal inertia of 240(-60)(+440) Jm(-2) s(-0.5) K-1 for a best-fitting solution at 1 sigma level. The best-estimate thermal inertia indicates that fine-grained regolith may cover a large area of Bennu's surface, with a grain size that may range from 1.3 to 31 mm, and our outcome further supports that Bennu would be a suitable target for the OSIRIS-REx mission to return samples from the asteroid to Earth.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: THERMAL INFRARED OBSERVATIONS ; 175706 1996 FG3 ; SPECTROSCOPIC SURVEY ; PHYSICAL-PROPERTIES ; MODEL ; LIGHTCURVE ; RQ(36) ; SHAPE
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000360851100028
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14907
Appears in Collections:行星科学与深空探测实验室_期刊论文
太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
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