Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observables of a test-mass along an inclined orbit in a post-Newtonian
  approximated Kerr spacetime to leading-order-quadratic-in-spin   The orbital motion is derived for a non-spinning test-mass in the
relativistic, gravitational field of a rotationally deformed body not
restricted to the equatorial plane or spherical orbit. The gravitational field
of the central body is represented by the Kerr metric, expanded to second
post-Newtonian order including the linear and quadratic spin terms. The orbital
period, the intrinsic periastron advance, and the precession of the orbital
plane are derived with the aid of novel canonical variables and action-based
methods.

33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat