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James A. Van Allen journal, October 1955-March 1958
Page 11
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22 November Yesterday I was in Washington D.C. attending the second meeting of the Technical Panel on the Earth Satellite Program: Main items of business: Budget, optical tracking, technical status of Project Vanguard, Scientific Symposium. ----------------------------- Stellar Magnitudes (Moulton) 20 Brightest stars - 1st magnitude faintest visible to unaided eye - 6th {△Magn.}{Ratio of Brightness} -------------------------------------- {0.1}{1.096} {0.5}{1.585} {1.0}{2.512} {5}{100.} {10}{10,000.} etc. r ⁵ = 100 r = (fifth root of 100) = 2.512 Venus = -4 Sun = -26.7
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22 November Yesterday I was in Washington D.C. attending the second meeting of the Technical Panel on the Earth Satellite Program: Main items of business: Budget, optical tracking, technical status of Project Vanguard, Scientific Symposium. ----------------------------- Stellar Magnitudes (Moulton) 20 Brightest stars - 1st magnitude faintest visible to unaided eye - 6th {△Magn.}{Ratio of Brightness} -------------------------------------- {0.1}{1.096} {0.5}{1.585} {1.0}{2.512} {5}{100.} {10}{10,000.} etc. r ⁵ = 100 r = (fifth root of 100) = 2.512 Venus = -4 Sun = -26.7
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