Was curious what the actual energy available for Voyager 1 & 2 actually is, so I went and looked. Ended up finding much greater amount than I actually planned to.
At 43.9151 years (September 5, 1977), Voyager 1 is now at 49.14% (last report) of what used to be a 471 watt power supply at start of mission.
At 43.5263 years (August 20, 1977), Voyager 2 is now at 49.09% (last report) of what used to be a 476 watt power supply at start of mission.
The data was found from a kind of humorous paper and dataset publication on the subject that actually covers every RTG that was ever launched and used to only be available on "The Graph."
The full dataset has RTG data from: Transit 5BN-1, Transit 5BN-2, Nimbus III, Pioneer 10, Pioneer 11, Viking 1, Viking 2, Apollo 12, Apollo 14, Apollo 15, Apollo 16, Apollo 17, Triad-01-1X, LES 8, LES 9, Voyager 1, Voyager 2, Galileo, Ulysses (F-3), Cassini, New Horizons, Curiosity, and Perseverance
The authors request the following reference for the use: C.E. Whiting and D.F. Woerner, "Chapter 8: Lifetime Performance of Spaceborne RTGs," The Technology of Discovery: Radioisotope Thermoelectric Generators and Thermoelectric Technologies for Space Exploration, D.F. Woerner, Ed., John Wiley & Sons, 2023. ISBN: 9781119811367
At 43.9151 years (September 5, 1977), Voyager 1 is now at 49.14% (last report) of what used to be a 471 watt power supply at start of mission.
At 43.5263 years (August 20, 1977), Voyager 2 is now at 49.09% (last report) of what used to be a 476 watt power supply at start of mission.
The data was found from a kind of humorous paper and dataset publication on the subject that actually covers every RTG that was ever launched and used to only be available on "The Graph."
The publication version of "The Graph": https://www.tandfonline.com/cms/asset/cdf5f3b7-d619-4b10-93b...
The full dataset has RTG data from: Transit 5BN-1, Transit 5BN-2, Nimbus III, Pioneer 10, Pioneer 11, Viking 1, Viking 2, Apollo 12, Apollo 14, Apollo 15, Apollo 16, Apollo 17, Triad-01-1X, LES 8, LES 9, Voyager 1, Voyager 2, Galileo, Ulysses (F-3), Cassini, New Horizons, Curiosity, and Perseverance
Paper: https://www.tandfonline.com/doi/full/10.1080/00295450.2024.2...
Dataset: https://datadryad.org/dataset/doi:10.5061/dryad.1zcrjdfw2
The authors request the following reference for the use: C.E. Whiting and D.F. Woerner, "Chapter 8: Lifetime Performance of Spaceborne RTGs," The Technology of Discovery: Radioisotope Thermoelectric Generators and Thermoelectric Technologies for Space Exploration, D.F. Woerner, Ed., John Wiley & Sons, 2023. ISBN: 9781119811367