The Vilnius photometric system is a medium-band seven-colour photometric system (UPXYZVS), created in 1963 by Vytautas Straižys and his coworkers. This system was highly optimized for classification of stars from ground based observations. The system was chosen to be medium-band, to ensure the possibility to measure faint stars.
Read more about Vilnius Photometric System: Selection of Bandpasses, Normalization, Mean Wavelength and Half-widths of Response Functions
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