  We present X-ray observations of PWN G16.73+0.08/SNR G16.7+0.1 using archival
data of {\it Chandra} ACIS. The X-ray emission peak location of this pulsar
wind nebula is found to be offset by 24 arcsec from the centre of the 1.4-GHz
emission of this nebula. The X-ray nebula is elongated in the direction from
the X-ray peak to the 1.4-GHz emission centre. This offset suggests that
G16.73+0.08 is an evolved pulsar wind nebula interacting with the supernova
remnant reverse shock. We identify a point source, CXO J182058.16-142001.5,
near the location of the X-ray peak. The spectrum of the X-ray nebula can be
described by an absorbed power law of photon index $0.98^{+0.79}_{-0.71}$ and
hydrogen column density $N_{\rm H}=4.99^{+2.75}_{-2.28}\times 10^{22}$
cm$^{-2}$. CXO J182058.16-142001.5 is likely a pulsar. We estimate its
spin-down power to be about $2.6\times 10 ^{36}$ erg s$^{-1}$. Assuming its age
at 3000 and 10,000 years, its dipole magnetic field strength at the polar
surface is estimated to be about $4.2 \times 10^{13}$ G and $1.3 \times
10^{13}$ G, respectively.
