Phase angle–polarization degree curve of 1999 JD₆. The data arethe nightly weight means (see Table 2). The symbols in the legend indicate each of the nightly data, with the V band in green and the R_C band in red. The June 14, 2015, data, which had a noticeably larger error bar, had faint magnitude and poor sky conditions, but were adopted because no other data were available around this phase angle.