Trojan group

Trojan group

(troh -jăn) Either of two groups of asteroids that lie in the vicinity of one of the two Lagrangian points in the orbit of Jupiter around the Sun: each group occupies one corner of an equilateral triangle with the Sun and Jupiter at the other corners. Beginning with the first Trojan to be discovered, (588) Achilles in 1906, most have been named after heroes from the two sides of the Trojan Wars. In fact, perturbations by other planets mean that each member of the group oscillates considerably in position (mainly in longitude along the orbit of Jupiter) from its stable Lagrangian point. It is likely that perturbations and collisions between them cause the total number of members of the group to change with time. Recent surveys suggest that more than 1000 Trojan group members may be bright enough to be seen from the Earth but fewer than 2% of these have yet received official asteroid designations. They are all exceptionally dark bodies.
References in periodicals archive ?
With the Trojan group of companies now operating in 11 different countries, Ameri sees this as an opportunity to showcase the best of the UAE construction industry to the world.
Trojan group managing director Tony Chadwick said: "As with all manufacturing industry we were hit hard, but we saw the economic crisis as an opportunity to refocus the business and improve our business efficiency.