The Elemental Composition of Asteroid 433 Eros: Results of the NEAR-Shoemaker X-ray Spectrometer-Reference-Cited by-同舟云学术

The Elemental Composition of Asteroid 433 Eros: Results of the NEAR-Shoemaker X-ray Spectrometer

Published:2000-09-22 Issue:5487 Volume:289 Page:2101-2105
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Trombka J. I.¹,Squyres S. W.²,Brückner J.³,Boynton W. V.⁴,Reedy R. C.⁵,McCoy T. J.⁶,Gorenstein P.⁷,Evans L. G.⁸,Arnold J. R.⁹,Starr R. D.¹⁰,Nittler L. R.¹,Murphy M. E.¹⁰,Mikheeva I.⁴,McNutt R. L.¹¹,McClanahan T. P.¹,McCartney E.²,Goldsten J. O.¹¹,Gold R. E.¹¹,Floyd S. R.¹,Clark P. E.¹⁰,Burbine T. H.⁶,Bhangoo J. S.⁴,Bailey S. H.⁴,Petaev M.⁷

Affiliation:

1. Goddard Space Flight Center, Code 691, Greenbelt, MD 20771, USA.

2. Space Sciences Building, Cornell University, Ithaca, NY 14853, USA.

3. Max-Planck-Institut für Chemie, Postfach 3060, D-55020 Mainz, Germany.

4. Department of Planetary Science, Space Sciences Building, University of Arizona, Tucson, AZ 85721, USA.

5. Los Alamos National Laboratory, NIS-2, MS-D436, Los Alamos, NM 87545, USA.

6. Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560–0119, USA.

7. Smithsonian Astrophysical Observatory, 60 Garden Street, MS-4, Cambridge, MA 02138, USA.

8. System Sciences Division, Computer Sciences Corporation, 1100 West Street, Laurel, MD 20707, USA.

9. University of California, San Diego, Chemistry BC-017/Cal Space 0524, 9500 Gillman Drive, La Jolla, CA 92093, USA.

10. Physics Department, Catholic University of America, 620 Michigan Avenue NE, Washington, DC 20064, USA.

11. Applied Physics Laboratory, Johns Hopkins University, Johns Hopkins Road, Laurel, MD 20723, USA.

Abstract

We report major element composition ratios for regions of the asteroid 433 Eros imaged during two solar flares and quiet sun conditions during the period of May to July 2000. Low aluminum abundances for all regions argue against global differentiation of Eros. Magnesium/silicon, aluminum/silicon, calcium/silicon, and iron/silicon ratios are best interpreted as a relatively primitive, chondritic composition. Marked depletions in sulfur and possible aluminum and calcium depletions, relative to ordinary chondrites, may represent signatures of limited partial melting or impact volatilization.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference32 articles.

1. Trombka J. I., et al., J. Geophys. Res. 102, 23729 (1997).

2. Goldsten J. O., et al., Space Sci. Rev. 82, 169 (1997).

3. P. E. Clark S. R. Floyd J. I. Trombka NASA Conf. Publ. NASA CP-3353 31 (1997).

4. Veverka J., et al., J. Geophys. Res. 102, 23709 (1997).

5. Hawkins S. E., et al., Space Sci. Rev. 82, 31 (1997).

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