  We present measurements of the mid-infrared (MIR) emission from SN 1987A,
made using the Infrared Space Observatory (ISO) 11 years after outburst. They
are the only late epoch detections of this source in the thermal IR regime. The
position of the source, determined from an offset to an IR-emitting star,
suggests that the emission is associated with SN 1987A or its extended
supernova remnant (SNR). A predominantly circumstellar origin is however
suggested by the size and orientation of the IR-emitting region, which is
comparable with the extension of the inner ring seen with the Hubble Space
Telescope (HST). The emission is most probably from collisionally-heated
circumstellar grains embedded in shocked gas downstream of the blast wave. The
MIR extent is consistent with the hypothesis that the blast wave was
propagating into material of moderate density interior to the thick inner ring
at the epoch of the ISOCAM observations.
