Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Motion properties of satellites around external spiral galaxies   We are analyzing a sample of closeby galaxy systems, each comprising a bright
isolated spiral and its satellites. We find an excess (56%) of prograde
satellites over retrograde, which basically holds for all angular displacements
from the primary major axis. Monte Carlo simulations show that interlopers and
mixing systems at different distances in the sample should not affect
porcentages sensibly.

27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin