Light curve of HD 22946 from the Hipparcos Epoch Photometry data (V-band, top panel), and the corresponding power spectrum (bottom panel). In the top panel, the mean luminosity and standard deviation are also shown: the scatter in the photometric data is compatible with a low-amplitude variability. The peak of the power spectrum, indicated by the orange vertical line, is found at ≈0.073 days, and it is likely due to instrumental aliasing.