  Let $H < G$ both be noncompact connected semisimple real algebraic groups and
$\Gamma < G$ be a lattice. Building on the work of Gorodnik-Weiss, we refine
their techniques and obtain effective results. More precisely, we prove
effective convergence of the distribution of dense $\Gamma$-orbits in $G/H$ to
some limiting density on $G/H$ assuming effective equidistribution of regions
of maximal horospherical orbits under one-parameter diagonal flows inside a
dense $H$-orbit in $\Gamma \backslash G$. The significance of the effectivized
argument is due to the recent effective equidistribution results of
Lindenstrauss-Mohammadi-Wang for $\Delta(\operatorname{SL}_2(\mathbb R)) <
\operatorname{SL}_2(\mathbb R) \times \operatorname{SL}_2(\mathbb R)$ and
$\operatorname{SL}_2(\mathbb R) < \operatorname{SL}_2(\mathbb C)$ and
arithmetic lattices $\Gamma$, and future generalizations in that direction.
