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Table 1

Log of observations, measured polarisation parameters, and R magnitudes.

Date Sky r Δ α P Q P U R
(UT) (AU) (AU) (°) (%) (%) (mag)

Makemake
2011 04 03.21 PHO 52.208 51.369 0.60 −0.170 ± 0.045 0.000 ± 0.045 16.81 ± 0.05
2011 04 25.06 PHO 52.202 51.517 0.80 −0.316 ± 0.048 −0.044 ± 0.048 16.86 ± 0.05
2011 05 10.06 CLR 52.213 51.676 0.94 −0.050 ± 0.052 0.089 ± 0.052 16.77 ± 0.05
2011 05 14.04 PHO 52.213 51.725 0.97 −0.151 ± 0.085 −0.093 ± 0.086 16.80 ± 0.05
2011 05 29.05 THN 52.216 51.926 1.07 −0.114 ± 0.095 −0.110 ± 0.087
Orcus
2011 04 24.00 CLR 47.932 47.482 1.08 –1.062 ± 0.092 –0.115 ± 0.092 18.83 ± 0.05

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