  For describing the non-negative gravitational energy-momentum in terms of a
pure Bel-Robinson type energy-momentum in a quasi-local 2-surface, both the
Bel-Robinson tensor $B$ and tensor $V$ are suitable. We have found that this
Bel-Robinson type energy-momentum can be modified such that it satisfies the
Lorentz covariant, future pointing and non-spacelike properties. We find that
these particular quasi-local energy-momentum properties can be obtained from
(i): $B$ or $V$ plus a tensor $S$ in a small sphere limit, or (ii): directly
evaluating the energy-momentum of $B$ or $V$ in a small ellipsoid region.
(iii): calculate the total energy using the Landau-Lifshitz pseudotensor in a
small ellipsoid, from Jupiter's tidal force to Io in Schwarzchild spacetime, in
an elliptic orbit.
