Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Visual Spectroscopy of Asteroids at San Pedro Martir   We present low resolution reflectance spectra over the wavelength range
5000-10000\AA for 4 asteroids (3 belonging to the Nysa family and one
near-Earth asteroid) obtained at the San Pedro Martir Observatory (Mexico)
using the 2.1 m telescope. Though the limited wavelength range covered often
makes a classification difficult, the analysis of the available data reveals
that two asteroids of the Nysa family, (2007) McCuskey and (3130) Hillary, are
probably of F-type and (3384) Daliya of S-type. Near-Earth asteroid (3908) Nyx
(Amor asteroid) shows a spectrum, within the limits of our signal-to-noise
ratio (S/N), consistent with a V-type taxonomic classification and may be a
fragment excavated from Vesta by an impact.

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The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th