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UBV photometric system

The UBV photometric system (from Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually employed for classifying stars according to their colors. It was the first standardized photometric system. The apparent magnitudes of stars in the system are often used to determine the color indices B−V…

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UBV photometric system

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system used stars filters johnson photometric colors magnitudes color blue set combination morgan 13 corning filter limit also indices wavelength

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