The Mariner 5 spacecraft was the fifth in a series of spacecraft used for planetary exploration in the flyby mode. Mariner 5 was a refurbished backup spacecraft for the Mariner 4 mission and was converted from a Mars mission to a Venus mission. The spacecraft was fully attitude stabilized, using the sun and Canopus as references.
I’m wondering if NASA retained the 4 solar panels for the Mariner 5 mission to Venus, as other Spacecraft to Venus (Mariner 2 - 1962 and Mariner 10 - 1973) only used two solar panels as the mission took place close to the Sun