  We report the discovery of a spiral-like nebula with the Wide-field Infrared
Survey Explorer (WISE) and the results of optical spectroscopy of its
associated star TYC 8606-2025-1 with the Southern African Large Telescope
(SALT). We find that TYC 8606-2025-1 is a G8 III star of $\approx3$ M$_\odot$,
showing a carbon depletion by a factor of two and a nitrogen enhancement by a
factor of three. We also derived an excess of s-process elements, most strongly
for barium, which is a factor of three overabundant, indicating that TYC
8606-2025-1 is a mild barium star. We thereby add a new member to the small
group of barium stars with circumstellar nebulae. Our radial velocity
measurements indicate that TYC 8606-2025-1 has an unseen binary companion. The
advanced evolutionary stage of TYC 8606-2025-1, together with the presence of a
circumstellar nebula, implies an initial mass of the companion of also about 3
M$_\odot$. We conclude that the infrared nebula, due to its spiral shape, and
because it has no optical counterpart, was ejected by the companion as a
consequence of a very late thermal pulse, during about one orbital rotation.
