Asteroid 9951, Tyrannosaurus, was discovered on November 15, 1990, at la Silla Observatory near Pedernales, Coquimbo, Chile, by Eric W. Elst. It has a period of 3 years, 285 days.
Tyrannosaurus is named for the dinosaur known by its scientific name, Tyrannosaurus rex ("king tyrant lizard"), or, affectionately, as T. rex.
Astrologically, though, T. rex's reputation seems to inspire its meaning: formidable, menacing, voracious, predatory, dangerous.
In one of the most famous incidents of the little-known China-India-Burma Theater of World War II, hundreds of Japanese soldiers pinned down by British troops in a coastal swamp on the Bay of Bengal near Ramree, Burma on the night of February 19, 1942 were devoured by hordes of huge, voracious estuarine crocodiles, Tyrannosaurus was tightly sextile Uranus and Heracles and trine Pluto, and also conjunct Ixion and Cruithne and opposite Pallas. It was a bizarre and primally terrifying but effective way of conducting warfare.
Adolf Hitler had Tyrannosaurus in the eighth house, trine Damocles, Nessus and Thersites (railing against something), and semisextile Vesta (commitment, dedication, intensity.
John Wayne Gacy had Tyrannosaurus in the seventh house, prominent--conjunct Jupiter, as well as Asbolus--and also square the Nodes and trine Venus. He was a building contractor and a small-town or neighborhood big shot.
Theodore Kaczynski, the Unabomber, has Tyrannosaurus tightly semisquare Agamemnon (attacks on people at home) and square Ixion (inventiveness, bad karma, technology).
Notorious hotelier Leona Helmsley has Tyrannosaurus in the third house of the media, semisquare the Ascendant (personal interests) and opposite Uranus (rebellion, populism).
Muhammad Ali, a much more benign and well-liked sort of person, has Tyrannosaurus in the tenth house, tightly semisextile Don Quixote (taking on the system) and square the Ascendant, and also conjunct Chariklo (glamor, need to maintain perspective) and Pandora (stirring things up, having an impact), sextile Pluto (the unforgettable), and trine Ceres (family, nurturance) and Ixion (lustiness). He has managed to combine boxing with political activism in a positive manner.
The glyph for Tyrannosaurus is mine.