  We have derived the albedo ($a$) and phase function asymmetry factor ($g$) of
interstellar dust grains at 1100 \AA ~ using archival {\it Voyager}
observations of diffuse radiation in Ophiuchus. We have found that the grains
are highly forward scattering with $g =$ 0.55 $\pm$ 0.25 and $a =$ 0.40 $\pm$
0.10. Even though most of the gas in this direction is in the Ophiuchus
molecular cloud, the diffuse FUV radiation is almost entirely due to scattering
in a relatively thin foreground cloud. This suggests that one cannot assume
that the UV background is directly correlated with the total amount of gas in
any direction.
