The lunar sodium tail extends long distances due to radiation pressure on
sodium atoms in the lunar exosphere. Our earlier observations measured the
average radial velocity of sodium atoms moving down the lunar tail beyond Earth
(i.e., near the anti-lunar point) to be $\sim 12.5$ km/s. Here we use the
Wisconsin H-alpha Mapper to obtain the first kinematically resolved maps of the
intensity and velocity distribution of this emission over a $15 \times 15 \deg$
region on the sky near the anti-lunar point. We present both spatially and
spectrally resolved observations obtained over four nights bracketing new Moon
in October 2007. The spatial distribution of the sodium atoms is elongated
along the ecliptic with the location of the peak intensity drifting $3 \deg$
east along the ecliptic per night. Preliminary modeling results suggest the
spatial and velocity distributions in the sodium exotail are sensitive to the
near surface lunar sodium velocity distribution. Future observations of this
sort along with detailed modeling offer new opportunities to describe the time
history of lunar surface sputtering over several days.
