Koen, Chris2023-02-102023-02-102007Koen, C. (2007). HE 0230–4323: An unusual pulsating hot subdwarf star. Monthly Notices of the Royal Astronomical Society, 377(3), 1275–1280. https://doi.org/10.1111/j.1365-2966.2007.11684.x1365-2966https://doi.org/10.1111/j.1365-2966.2007.11684.xhttp://hdl.handle.net/10566/8404HE 0230−4323 is a known binary, consisting of a subdwarf star and a companion which is not observable in the optical. Photometric measurements reported in this paper have shown it to be both a reflection-effect and a pulsating variable. The dominant pulsation frequencies changed over the course of several nights of observing, from ∼32–39 d−1 to ∼8–16 d−1. Observations were obtained through B and V filters, and the variations in the two wavebands appear to be approximately 180◦ out of phase.enStatistics studiesSubdwarf starBinariesSouth AfricaAstronomyArticle