I've seen some predictions on foward scattering enhancement of the comet and although the amount is very uncertain it predicts the peak effect will be on January 14, with some possible enhancement still remaining as late as January 19. Interestingly the comet is just over a degree away from Mercury on January 14 (which is mag -1). Another safer possibility for observing the comet may come just after sunset the following evening when it is better placed for observation, and hopefully nearly as bright.
Terry
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