Small D-type asteroids in the NEO population: new targets for space missions

被引：23

作者：

Barucci, Maria Antonietta ^{[1
]}

Perna, D. ^{[1
,2
]}

Popescu, M. ^{[1
,3
]}

Fornasier, S. ^{[1
]}

Doressoundiram, A. ^{[1
]}

Lantz, C. ^{[4
]}

Merlin, F. ^{[1
]}

Fulchignoni, M. ^{[1
]}

Dotto, E. ^{[2
]}

Kanuchova, S. ^{[5
]}

机构：

[1] Sorbonne Univ, UPMC Univ Paris 06, Univ Paris Diderot,LESIA, PSL Res Univ,Sorbonne Paris Cite,Observ Paris,CNR, 5 Pl J Janssen, F-92195 Meudon Pricipal, France

[2] INAF, Osservatorio Astron Roma, Via Frascati 33, I-00078 Rome, Italy

[3] Romanian Acad, Astron Inst, 5 Cutitul Argint, Bucharest 040557, Romania

[4] Univ Paris 11, IAS, CNRS, UMR 8617, Bat 121, F-91405 Orsay, France

[5] Slovak Acad Sci, Astron Inst, Tatranska Lomnica 05960, Slovakia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 476卷 / 04期

关键词：

techniques: spectroscopic; minor planets; asteroids:; general; TRANS-NEPTUNIAN OBJECTS; TAGISH LAKE METEORITE; NEAR-EARTH OBJECTS; ORGANIC-MOLECULES; SEDIMENTARY-ROCKS; TROJAN ASTEROIDS; CARBON; BELT; LIFE; CAPTURE;

D O I：

10.1093/mnras/sty532

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the framework of the Near Earth Objects (NEOs) observational campaign carried out within the NEOShield-2 project, we identify nine new small D-type asteroids with estimated diameter less than 600 m. The link with meteorites for this class of asteroids is weak and the best fit obtained is with the Tagish Lake meteorite for seven of them. D-type asteroids are believed to contain the most pristine material of the Solar system and could have delivered the pre-biotic material to the Earth. Our results double the known sample of the D-types in the NEO population and triple the candidates of this class for a sample-return mission (at very low Delta V). Our finding increases considerably the number of targets for sample-return mission. A sample-return mission to a D-type asteroid will provide a major progress in understanding the early history of the Solar system and to investigate the origin of life on the Earth.

引用

页码：4481 / 4487

页数：7

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