Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 行星科学与深空探测实验室

	Surface thermophysical properties determination of OSIRIS-REx target asteroid (101955) Bennu
	Yu, LiangLiang; Ji, Jianghui
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	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
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.
学科主题	天文和天体物理
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
语种	英语
WOS记录号	WOS:000360851100028
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/14907]
专题	紫金山天文台_行星科学与深空探测实验室紫金山天文台_太阳活动的多波段观测研究团组
作者单位	Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 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.