The partial lunar eclipse of July 16, 2019 was visually measured as magnitude -0.65 (whole-disk equivalent) with Danjon index 1 using defocused Jupiter and Saturn as comparison light sources.
S., Yendell, Journal: Popular Astronomy, 13, 453 (1905)
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Measuring Danjon index and umbral magnitude of a partial lunar eclipse (July 16, 2019)
The partial lunar eclipse of July 16, 2019 was visually measured as magnitude -0.65 (whole-disk equivalent) with Danjon index 1 using defocused Jupiter and Saturn as comparison light sources.