Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confirmation of Large Super-Fast Rotator (144977) 2005 EC127   (144977) 2005 EC127 is an V-/A-type inner-main-belt asteroid with a diameter
of 0.6 +- 0.1 km. Asteroids of this size are believed to have rubble-pile
structure, and, therefore, cannot have a rotation period shorter than 2.2
hours. However, our measurements show that asteroid 2005 EC127 completes one
rotation in 1.65 +- 0.01 hours with a peak-to-peak light-curve variation of
~0.5 mag. Therefore, this asteroid is identified as a large super-fast rotator.
Either a rubble-pile asteroid with a bulk density of ~6 g cm^-3 or an asteroid
with an internal cohesion of 47 +- 30 Pa can explain 2005 EC127. However, the
scenario of high bulk density is very unlikely for asteroids. To date, only six
large super-fast rotators, including 2005 EC127, have been reported, and this
number is very small when compared with the much more numerous fast rotators.
We also note that none of the six reported large SFRs are classified as C-type
asteroids.

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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ