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| Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu | |
Yu, LiangLiang ; Ji, Jianghui
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| 2015-09-01 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| Volume | 452Issue:1Pages:368-375 |
| Abstract | 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. |
| Keyword | Radiation Mechanisms: Thermal Minor Planets, Asteroids: Individual: (101955) Bennu Infrared: General |
| Subject Area | 天文和天体物理 |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1093/mnras/stv1270 |
| WOS Keyword | THERMAL INFRARED OBSERVATIONS ; 175706 1996 FG3 ; SPECTROSCOPIC SURVEY ; PHYSICAL-PROPERTIES ; MODEL ; LIGHTCURVE ; RQ(36) ; SHAPE |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000360851100028 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://libir.pmo.ac.cn/handle/332002/14907 |
| Collection | 行星科学与深空探测实验室 太阳活动的多波段观测研究团组 |
| Affiliation | Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China |
| Recommended Citation GB/T 7714 | Yu, LiangLiang,Ji, Jianghui. Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,452(1):368-375. |
| APA | Yu, LiangLiang,&Ji, Jianghui.(2015).Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,452(1),368-375. |
| MLA | Yu, LiangLiang,et al."Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452.1(2015):368-375. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2015016.pdf（766KB） | 开放获取 | Apache License | View Application Full Text | |||
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