Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Pioneer Anomaly   In this paper an explanation of the Pioneer anomaly is given, using the
hypothesis of the time dependent gravitational potential. The implications of
this hypothesis on the planetary orbits and orbital periods are given in
section 2. In sections 3 and 4 we give a detailed explanation of the Pioneer
anomaly, which corresponds to the observed phenomena.

29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin