Historical brightness chart of Betelgeuse from 1890 to 03 Aug 2026. The y-axis shows visual magnitude; brighter is up, fainter is down. Amber dots show 30-day averaged observations across 135 years. A red line highlights the last 90 days at 3-day resolution, with a red dot marking the current value. A dashed line marks the historical median. The Great Dimming of 2019/2020 is shaded. Current magnitude is 0.40, brighter than 93% of all recorded monthly averages. Data source: AAVSO visual (by-eye) observations.

Historical brightness chart of Betelgeuse from 1890 to 03 Aug 2026. The y-axis shows visual magnitude; brighter is up, fainter is down. Amber dots show 30-day averaged observations across 135 years. A red line highlights the last 90 days at 3-day resolution, with a red dot marking the current value. A dashed line marks the historical median. The Great Dimming of 2019/2020 is shaded. Current magnitude is 0.40, brighter than 93% of all recorded monthly averages. Data source: AAVSO visual (by-eye) observations.