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Space weathering of asteroids: similarities and discrepancies between Main Belt asteroids and NEOs

Published online by Cambridge University Press:  01 August 2006

S. Marchi ,
P. Paolicchi ,
M. Lazzarin  and
S. Magrin
S. Marchi
Affiliation:
Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I-35122 Padova, Italy email: [email protected]; [email protected]; [email protected]
P. Paolicchi
Affiliation:
Dipartimento di Fisica, Università di Pisa, largo Pontecorvo 3, I-56127 Pisa, Italy email: [email protected]
M. Lazzarin
Affiliation:
Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I-35122 Padova, Italy email: [email protected]; [email protected]; [email protected]
S. Magrin
Affiliation:
Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, I-35122 Padova, Italy email: [email protected]; [email protected]; [email protected]
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Abstract

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A sample of 35 C–complex objects is present among near–Earth objects. In spite of the poor statistics, some striking differences compared to Main Belt asteroids can be established: for instance the percentage of near–Earth objects (NEOs) showing hydration features is very small. Moreover the spectral slope of C–complex NEOs seems to be anti–correlated with the exposure to the ion flux coming from the Sun, in contrast with the general behavior of C–complex Main Belt asteroids (and of most asteroids, in general). We discuss some possible implications and suggest some preliminary partial explanations.

Keywords

asteroidssurface
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S236: Near Earth Objects, our Celestial Neighbors: Opportunity and Risk , August 2006 , pp. 239 - 242
Copyright
Copyright © International Astronomical Union 2007

References

Hiroi, T., Zolensky, M.E., Pieters, C.M. & Lipschutz, M.E. 1996, Thermal metamorphism of the C, G, B, and F asteroids seen from the 0.7 micron, 3 micron and UV absorption strengths in comparison with carbonaceous chondrites. M&PS 31, 321Google Scholar
Hsieh, H. & Jewitt, D. 2006, A Population of Comets in the Main Asteroid Belt. Science 312, 561CrossRefGoogle ScholarPubMed
Lazzarin, M., Marchi, S., Moroz, L.V., Brunetto, R., Magrin, S., Paolicchi, P. & Strazzulla, G. 2006, Space weathering in the Main Asteroid Belt: The big picture. ApJ 647, L179CrossRefGoogle Scholar
Marchi, S., Paolicchi, P., Lazzarin, M. & Magrin, S. 2006a, A General Spectral Slope–Exposure Relation for S-Type Main Belt and Near–Earth Asteroids. AJ 131, 1138CrossRefGoogle Scholar
Marchi, S., Magrin, S., Nesvorný, D., Paolicchi, P. & Lazzarin, M. 2006b, A spectral slope versus perihelion distance correlation for planet–crossing asteroids.Mon. MNRAS 368, L39CrossRefGoogle Scholar
Morbidelli, A., Bottke, W.F., Froeschlé, Ch. & Michel, P. 2002, Origin and Evolution of Near–Earth Objects. in: Bottke, W.F., Cellino, A., Paolicchi, P. & Binzel, R.P. (eds.), Asteroids III (Tucson: University of Arizona Press), p. 619Google Scholar