Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Gaia-FUN-SSO observation campaign of 99942 Apophis: A preliminary
  test for the network   In order to test the coordination and evaluate the overall performance of the
Gaia-FUN-SSO, an observation campaign on the Potentially Hazardous Asteroid (99
942) Apophis was conducted from 12/21/2012 to 5/2/2013 providing 2732 high
quality astrometric observations. We show that a consistent reduction of
astrometric campaigns with reliable stellar catalogs substantially improves the
quality of astrometric results. We present evidence that the new data will help
to reduce the orbit uncertainty of Apophis during its close approach in 2029.

22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ