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Science 16 June 2000:
Vol. 288. no. 5473, pp. 2033 - 2035
DOI: 10.1126/science.288.5473.2033
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Reports
Discovery of a Basaltic Asteroid in the Outer Main Belt
D. Lazzaro,
1*
T. Michtchenko,
2
J.
M. Carvano,
1
R. P. Binzel,
3
S. J. Bus,
3
T. H. Burbine,
3
T. Mothé-Diniz,
1
M. Florczak,
4
C. A. Angeli,
1
Alan W. Harris
5
Visible and near-infrared spectroscopic observations of
the asteroid 1459 Magnya indicate that it has a basaltic surface. Magnya is at 3.15 astronomical units (AU) from the sun and has no known
dynamical link to any family, to any nearby large asteroid, or to
asteroid 4 Vesta at 2.36 AU, which is the only other known large
basaltic asteroid. We show that the region of the belt around Magnya is
densely filled by mean-motion resonances, generating slow orbital
diffusion processes and providing a potential mechanism for removing
other basaltic fragments that may have been created on the same parent
body as Magnya. Magnya may represent a rare surviving fragment from a
larger, differentiated planetesimal that was disrupted long ago.
1 Observatório Nacional, Departamento de
Astrofísica, Rua Gal. José Cristino 77, 20921-400 Rio de
Janeiro, Brazil.
2 Instituto Astronômico e
Geofísico, Universidade de São Paulo, Av. Miguel Stefano
4200, 04301-904 São Paulo, Brazil.
3 Department of
Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute
of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4301, USA.
4 Centro Federal de Educacão Tecnológica do
Paraná, Departamento de Física, Av. Sete de Setembro
3165, 80230-901 Curitiba, Brazil.
5 Jet Propulsion
Laboratory, MS 183-501, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
*
To whom correspondence should be addressed.
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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
- Oxygen and Asteroids.
- T. H. Burbine, A. S. Rivkin, S. K. Noble, T. Mothe-Diniz, W. F. Bottke, T. J. McCoy, M. D. Dyar, and C. A. Thomas (2008)
Reviews in Mineralogy and Geochemistry
68, 273-343
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- A New Source of Basaltic Meteorites Inferred from Northwest Africa 011.
- A. Yamaguchi, R. N. Clayton, T. K. Mayeda, M. Ebihara, Y. Oura, Y. N. Miura, H. Haramura, K. Misawa, H. Kojima, and K. Nagao (2002)
Science
296, 334-336
| Abstract »
| Full Text »
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