Abstract
Comet Austin (1989c 1 ) was observed during 1990 May and June when its phase angle changed from 26° to 8°. The degree of linear polarization was seen to change from positive to negative polarizations at a phase angle of 20.°5, with a rate of change of 0.19 per cent per degree in the R waveband. This phase dependence of polarization is similar to that found for other comets, except that the dust grains giving rise to the polarization have a higher albedo than those found in other comets at similar distances from the Sun. No unusual activity in the form of jets or shells is seen in the polarization images
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