thumb|upright=1.36|Diagram of an RTG used on the Cassini probe thumb|right|Diagram of a stack of general-purpose heat source modules as used in RTGs thumb|right|Image of a plutonium RTG pellet glowing incandescence|red hot. GPHS-RTG or general-purpose heat source — radioisotope thermoelectric generator, is a specific design of the radioisotope thermoelectric generator (RTG) used on US space missions. The GPHS-RTG was used on Ulysses (1), Galileo (2), Cassini-Huygens (3), and New Horizons (1).
thumb|upright=1.36|Diagram of an RTG used on the Cassini probe thumb|right|Diagram of a stack of general-purpose heat source modules as used in RTGs thumb|right|Image of a plutonium RTG pellet glowing incandescence|red hot. GPHS-RTG or general-purpose heat source — radioisotope thermoelectric generator, is a specific design of the radioisotope thermoelectric generator (RTG) used on US space missions. The GPHS-RTG was used on Ulysses (1), Galileo (2), Cassini-Huygens (3), and New Horizons (1).
The GPHS-RTG has an overall diameter of 0.422 m and a length of 1.14 m. Each GPHS-RTG has a mass of about 57 kg and generates about 300 watts of electrical power at the start of mission (5.2 We/kg), using about 8.1 kg of Pu-238 which produces about 4,400 watts of thermal power. The plutonium oxide fuel is in 18 GPHSs. Note that the GPHS are cuboid although they contain cylindrical plutonium based pellets.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).