Value of the four activity indicators considered: log(), H_α, NaI, and HeI, from top to bottom, as a function of Julian date. The points close to apastron are represented in the left panels and those close to periastron in the right panels. The blue points represent the individual measurements and uncertainties as listed in Table 3. In red we plot the weighted average and associated uncertainty for the points close to apastron and points close to periastron. The dashed line is the weighted average of the six measurements and is a visual guideline for the variation inside the dataset.