  We present new, high-precision Doppler radial velocity (RV) data sets for the
nearby K3V star HD 219134. The data include 175 velocities obtained with the
HIRES Spectrograph at the Keck I Telescope, and 101 velocities obtained with
the Levy Spectrograph at the Automated Planet Finder Telescope (APF) at Lick
Observatory. Our observations reveal six new planetary candidates, with orbital
periods of P=3.1, 6.8, 22.8, 46.7, 94.2 and 2247 days, spanning masses of
msini=3.8, 3.5, 8.9, 21.3, 10.8 and 108 M_earth respectively. Our analysis
indicates that the outermost signal is unlikely to be an artifact induced by
stellar activity. In addition, several years of precision photometry with the
T10 0.8~m automatic photometric telescope (APT) at Fairborn Observatory
demonstrated a lack of brightness variability to a limit of ~0.0002 mag,
providing strong support for planetary-reflex motion as the source of the
radial velocity variations. The HD 219134 system, with its bright (V=5.6)
primary provides an excellent opportunity to obtain detailed orbital
characterization (and potentially follow-up observations) of a planetary system
that resembles many of the multiple-planet systems detected by Kepler, and
which are expected to be detected by NASA's forthcoming TESS Mission and by
ESA's forthcoming PLATO Mission.
