Photoelectric Photometry of Saturn by the Rakosch Area Scanner

The photometric behavior of Saturn' rings and disk is known to be very complex. Since 1971 (except 1973-1974) photoelectric area scanning photometry of Saturn has been carried out using the Rakosch Area Scanner attached to the 106 cm-f/14.5 Cassegrain reflector of Hoher List Observatory. Five different filters with the following effective wavelengths and halfwidths have been used: U (371 nm, 49 nm); B (425 nm, 84 nm); G (483 nm, 52 nm); V (551 nm, 74 nm); and R (627 nm, 42 nm). The paper reports on the wavelength and phase-angle dependence of the brightness of the rings, along with the wavelength dependence of Saturn's disk.