Estimates of radiative energy values in ground-level observations of an unidentified aerial phenomenon: New physical data
Jacques F. Vallee, Luc Dini, Geoffrey Mestchersky
Progress in Aerospace Sciences, Vol. 156
Summary
The first paper in Progress in Aerospace Sciences to analyze a specific documented UAP case — the December 30, 1966 Haynesville, Louisiana incident (Condon Study Case 2). Vallee, Dini, and Mestchersky apply optical physics to eyewitness accounts and photographic records, estimating 500-900 MW of radiative energy output from the observed object — comparable to a small nuclear power plant. Published in the same June 2025 PrAeS special issue as `knuth-2025-new-science-uap` and `vallee-nolan-jiang-lemke-2022`. This paper is historically significant: a flagship mainstream aerospace journal applying rigorous physical measurement to a specific, named UAP case marks a watershed in the field's academic acceptance.
Abstract
We report new physical data from a detailed re-analysis of optical and photographic records from the December 30, 1966 Haynesville, Louisiana UAP incident (designated Case 2 in the Condon Scientific Study of Unidentified Flying Objects). Applying standard optical physics methods to witness-described apparent angular diameters and brightness estimates, we derive a range of radiative energy values emitted by the observed phenomenon. Our analysis yields a radiative power estimate of 500 to 900 megawatts at the source, assuming a range of plausible distances consistent with the physical evidence. This output level is comparable to that of a small nuclear power plant and is inconsistent with conventional aircraft, natural atmospheric phenomena, or known terrestrial light sources of the era. We discuss the measurement methodology, sources of uncertainty, and the significance of this result for the physical characterization of UAP.
Citation
Jacques F. Vallee, Luc Dini, Geoffrey Mestchersky. (2025). Progress in Aerospace Sciences. Vol. 156. DOI: 10.1016/j.paerosci.2025.101098
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