An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 21 Search : asteroid
Trojan asteroid
  سیارک ِ ترویایی   
sayyârak-e Troâ-yi

Fr.: astéroïde troyen   

A member of the family of asteroids that share → Jupiter's orbit and lie in elongated, curved regions around the two → Lagrangian points 60° ahead and behind of Jupiter. The Lagrangian points L4 and L5 host several thousands of them. Originally, the term Trojan applied only to asteroids sharing Jupiter's orbit; however, planetoidal bodies have been discovered at the Lagrangian points of Mars and Neptune as well, and are also referred to as → Mars Trojans and Neptune Trojans respectively.

M.E.; O.E. Troian, from Trojanus, from Troj(a) "Troy" + -anus; → asteroid.

Sayyârakhâ plural of sayyârak, → asteroid; Troâ-yi adj. of Troâ "Troy."

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