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As ever-more sensitive experiments are made in the quest for primordial CMB BModes, the number of potentially significant astrophysical contaminants becomeslarger as well. Thermal emission from interplanetary dust, for example, hasbeen detected by the Planck satellite. While the polarization fraction of thisZodiacal, or interplanetary dust emission (IPDE) is expected to be low, it isbright enough to be detected in total power. Here, estimates of the magnitudeof the effect as it might be seen by the LiteBIRD satellite are made. The COBEIPDE model from Kelsall et al. (1998) is combined with a model of the LiteBIRDexperiment's scanning strategy to estimate potential contamination of the CMBin both total power and in polarization power spectra. LiteBIRD should detectIPDE in temperature across all of its bands, from 40 through 402 GHz, andshould improve limits on the polarization fraction of IPDE at the higher end ofthis frequency range. If the polarization fraction of IPDE is of order 1%, thecurrent limit from ISO/CAM measurements in the mid-infrared, it may inducelarge-scale polarization B Modes comparable to cosmological models with an r oforder 0.001. In this case, the polarized IPDE would also need to be modeled andremoved. As a CMB foreground, IPDE will always be subdominant to Galacticemissions, though because it caused by emission from grains closer to us, itappears variable as the Earth travels around the Sun, and may therebycomplicate the data analysis somewhat. But with an understanding of some of thesymmetries of the emission and some flexibility in the data processing, itshould not be the primary impediment to the CMB polarization measurement.

Interplanetary Dust as a Foreground for the LiteBIRD CMB Satellite Mission