in the center of the disk is the emblem of the Bank of Russia (double-headed eagle with the lowered wings, under it an inscription a semicircle «БАНК РОССИИ» framed by a circle of dots and inscriptions around the circle: at the top – «ПЯТЬДЕСЯТ РУБЛЕЙ» bottom "2004" on the left – label of metal, test of an alloy to the right is the contents of precious metal in cleanness and trade-mark of a mint.
picture of cancer on the background of the stars, on the left – sign of the zodiacal constellation Cancer.
Artist: S. A. Kozlov, A. D. Schablykin.
The Sculptor: A. A. Krasnov.
The constellation Cancer contains 102 stars visible to the naked eye. Located in the Northern hemisphere.
Source: Bank Of Russia