  We present 10' x 50' scan maps around an M supergiant Alpha Ori at 65, 90,
140 and 160 microns obtained with the AKARI Infrared Astronomy Satellite.
Higher spatial resolution data with the exact analytic solution permit us to
fit the de-projected shape of the stellar wind bow shock around Alpha Ori to
have the stand-off distance of 4.8', position angle of 55 degrees and
inclination angle of 56 degrees. The shape of the bow shock suggests that the
peculiar velocity of Alpha Ori with respect to the local medium is v_* = 40
(n_H)^(-1/2), where n_H is the hydrogen nucleus density at Alpha Ori. We find
that the local medium is of n_H = 1.5 to 1.9 cm^(-3) and the velocity of the
local flow is at 11 km s^(-1) by using the most recent astrometric solutions
for Alpha Ori under the assumption that the local medium is moving away from
the Orion OB 1 association. AKARI images may also reveal a vortex ring due to
instabilities on the surface of the bow shock as demonstrated by numerical
models. This research exemplifies the potential of AKARI All-Sky data as well
as follow-up observations with Herschel Space Telescope and Stratospheric
Observatory for Infrared Astronomy for this avenue of research in revealing the
nature of interaction between the stellar wind and interstellar medium.
