K2 light curve of EPIC 231153467 (CD-24 13065), another post-AGB/PPN star, shown in the upper panel. Note the apparent periodicity of ~6 d. The star’s frequency spectrum, is shown in the middle panel, exhibiting frequencies characteristic of the SLF phenomenon plus some that could be attributed to SPB variables and many frequencies above 5 day⁻¹, typical of Beta Cephei stars. Blue spectrum of the star obtained in Brazil, which is consistent with a B3 III classification, shown in the bottom panel. The absence of emission in the Balmer lines suggests that the star is likely a young post-AGB star.