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Abstract

A total of 52 brightness measurements of Saturn were made during its 2008-2009 apparition. (An apparition is the time interval between when the planet is in conjunction with the Sun to the next time that it is conjunction with the Sun.) The selected normalized magnitudes of Saturn for b = 3.0° are B(1,0) = -7.87 ± 0.02, V(1,0) = - 9.00 ± 0.01, R(1,0) = -9.62 ± 0.01 and I(1,0) = -9.63 ± 0.01. (I have defined b as the square root of the absolute value of the product of the Saturnicentric latitude of the Earth and of the Sun; b is a latitude that is always within about 27° of Saturn’s equator.) The selected solar phase angle coefficient, in units of magnitudes per degree are cB = 0.029 ± 0.009, cV = 0.025 ± 0.005, cR = 0.024 ± 0.005 and cI = 0.018 ± 0.006.

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