  We report the discovery of a second long-period giant planet orbiting HD
30177, a star previously known to host a massive Jupiter analog (HD 30177b:
a=3.8$\pm$0.1 au, m sin $i=9.7\pm$0.5 Mjup). HD 30177c can be regarded as a
massive Saturn analog in this system, with a=9.9$\pm$1.0 au and m sin
$i=7.6\pm$3.1 Mjup. The formal best fit solution slightly favours a closer-in
planet at $a\sim$7 au, but detailed n-body dynamical simulations show that
configuration to be unstable. A shallow local minimum of longer-period,
lower-eccentricity solutions was found to be dynamically stable, and hence we
adopt the longer period in this work. The proposed $\sim$32 year orbit remains
incomplete; further monitoring of this and other stars is necessary to reveal
the population of distant gas giant planets with orbital separations $a\sim$10
au, analogous to that of Saturn.
