Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: "TNOs are Cool": A survey of the trans-Neptunian region -- VII. Size and
  surface characteristics of (90377) Sedna and 2010 EK139   We present estimates of the basic physical properties (size and albedo) of
(90377) Sedna, a prominent member of the detached trans-Neptunian object
population and the recently discovered scattered disk object 2010 EK139, based
on the recent observations acquired with the Herschel Space Observatory, within
the "TNOs are Cool!" key programme. Our modeling of the thermal measurements
shows that both objects have larger albedos and smaller sizes than the previous
expectations, thus their surfaces might be covered by ices in a significantly
larger fraction. The derived diameter of Sedna and 2010 EK139 are 995 +/- 80 km
and 470 +35/-10 km, while the respective geometric albedos are pV 0.32 +/- 0.06
and 0.25 +0.02/-0.05. These estimates are based on thermophysical model
techniques.

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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: cs
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The categories of this paper are: eess