Infrared Observations of Comets Ikeya-seki (1965f) and Bennett (1969i)

Measurements of Comet Bennett (1969i) from 1.2 microns to 10 microns indicate the presence of material at a temperature of 590 K on 6 April 1970. The excellence of the fit of the flux values to a 590 K blackbody severely restricts the possible range of materials present. Specifically it precludes simple isolated small particle models to explain the excess temperature observed.