IRAS 17393-3004, a late-type supergiant surrounded by a dust shell

Infrared observations of IRAS 17393-3004, including a full scan ISOSWS1 are presented. The ISOSWS spectrum shows two prominent dust emission peaks at lambda 10.4 mu m and 17.5 mu m confirming that the source is a luminous sta r surrounded by a dust shell. The spectrum of the star, deduced from modeli ng of the radiative transfer through a spherical shell using the DUSTY code (Ivezic et al. 1997), can be explained along with other known properties i n terms of an M4 supergiant with OH, SiO and H2O maser emission and a large mass loss of similar to 10(-4) M. yr(-1).