Magnitude accuracies in pre-telescopic catalogs
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https://b2find.eudat.eu/dataset/ea8b65f3-d66c-5735-813a-f63f62bcd3bf
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Historical star magnitudes from catalogues by Ptolemy (137 AD), al-Sufi (964) and Tycho Brahe (1602/27) are converted to the Johnson V-mag scale and compared to modern day...
