Abstract
BM Ori is an eclipsing binary star in which a remarkable change in the shape of the light curve - especially the main minimum - was observed over the course of only a few years between 1968 and 2011. This paper focuses particularly on the primary minimum of November 10/11, 2025. A constant phase in the primary minimum was no longer observed: corresponding to “d” ≤ 0.01 [d]. Together with minima previously observed (December 2024 and all 2025 data), a delay of approximately 40 ± 20 minutes for the minimum now appears certain. This results in new instantaneous (heliocentric) elements: E0 = 2460990.483 ± 0.015 and P = 6.470559 ± 0.000007 [d].