IncidentThe Yukon UFO Sighting (11 December 1996, Canada)

aka The Yukon UFO Sighting (11 December 1996, Canada)

Roughly 30+ people across several Yukon communities along the Klondike Highway independently reported an enormous, silent, slow-moving craft covered in lights, with some estimating it up to a mile across; documented by engineer Martin Jasek and later correlated to the re-entry of the Russian Cosmos 2335 rocket booster ~145 miles away.

disputed-optical-artifact Many credible independent witnesses and a now-identified mundane stimulus (the Cosmos 2335 booster re-entry, doubly confirmed). What remains fundamentally unresolvable is the witnesses' size and distance claims - the eye cannot judge the scale of lights at night - so the mile-wide-craft descriptions can be neither verified nor reconstructed. Filed as a disputed optical artifact.

status history (1)

2026-06-14 · new → disputed-optical-artifact — seeded 2026-06-14 — corpus-growth pass (canonical cases the record lacked)

▸ Deep dive — full timeline, named personnel, sensors, theory-by-theory analysis, and the conventional explanations weighed against the open questions →

On the night of 11 December 1996 about 30 witnesses across Fox Lake, Carmacks, Pelly Crossing, and Mayo - spanning ~200 km - independently reported a huge, silent, slow-moving object with many rows of lights and downward beams, with size estimates ranging wildly from stadium-sized to a mile across. Engineer Martin Jasek (UFOBC) investigated and triangulated testimony, arguing for a physically large, low, nearby craft. In 2012 satellite analysts Ted Molczan and Harro Zimmer independently identified the stimulus as the re-entry of the second-stage booster of Cosmos 2335, launched earlier that day, at a true distance of ~233 km. The case is a textbook demonstration of the size/distance-judgment problem: lights in a dark sky carry no intrinsic distance cue, so a slow luminous debris train ~145 miles away reads as a mile-wide structured craft hovering at 300 yards.

Notable & intriguing

In 2012 orbital analysts Ted Molczan and Harro Zimmer independently identified the stimulus as the re-entry of the Cosmos 2335 second-stage booster, at a true distance of ~233 km - versus witness estimates of a few hundred yards to a few miles.

satobs.org; Robert Sheaffer, Skeptical Inquirer (2012)
Engineer Martin Jasek (UFOBC) documented ~22+ named-code witnesses across ~200 km and triangulated testimony arguing for a large, low, nearby craft; the misperception-of-stars hypothesis does NOT fit because the object clearly moved.

UFOBC Case 22; Whitehorse Star

Public-record items already documented about this subject. Folklore is labelled. Sources cited where the specificity warrants it.

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