  We report a late M-type, common proper motion companion to a nearby young
visual binary HIP 115147 (V368 Cep), separated by 963 arcseconds from the
primary K0 dwarf. This optically dim star has been identified as a candidate
high proper motion, nearby dwarf LSPM J2322+7847 by L{\'e}pine in 2005. The
wide companion is one of the latest post-T Tauri low mass stars found within 20
pc. We obtain a trigonometric parallax of $51.6\pm0.8$ mas, in good agreement
with the Hipparcos parallax of the primary star ($50.7\pm0.6$ mas). Our $BVRI$
photometric data and near-infrared data from 2MASS are consistent with LSPM
J2322+7847 being brighter by 1 magnitude in $K_s$ than field M dwarfs at
$V-K_s=6.66$, which indicates its pre-main sequence status. We conclude that
the most likely age of the primary HIP 115147 and its 11-arcsecond companion
HIP 115147B is 20-50 Myr. The primary appears to be older than its close analog
PZ Tel (age 12-20 Myr) and members of the TWA association (7 Myr).
