Solar System, Trojan (Astronomy), Near-Earth Object, Small Solar System Body
Spir
(2011-09-25
)
有获得代金券的资格
ISBN-13:
978-613-7-85231-6
ISBN-10:
6137852318
EAN:
9786137852316
书籍语言:
英文
作品简介:
4287 Třísov is a main belt asteroid with an orbital period of 1198.1476637 days (4.28 years)).The asteroid was discovered on September 7, 1989 by Antonín Mrkos. Asteroids (from Greek ἀστήρ 'star' and εἶδος 'like, in form') are a class of Small Solar System Bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet, but as small objects in the outer Solar System were discovered, their volatile-based surfaces were found to more closely resemble comets, and so were often distinguished from traditional asteroids.