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单词 Hirayama families
释义

Hirayama families

中文百科

平山族 Hirayama family

(重定向自Hirayama families)

平山族小行星是一些轨道要素相似的小行星,包括半长轴、扁率、和倾角,家族的成员被认为是以前的小行星碰撞后的碎片。

更确实的说,家族和成员的认定是依据分析所谓的固有轨道要素,而不是在数万年的岁月中已经发生变动,现在的有共同点的轨道要素。固有轨道要素是历经数千万年岁月仍然几乎是固定不变的运动常数。

英语百科

Hirayama family 平山族

(重定向自Hirayama families)

A Hirayama family of asteroids is a group of minor planets that share similar orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions.

Strictly speaking, families and their membership are identified by analysing the so-called proper orbital elements rather than the current osculating orbital elements, which regularly fluctuate on timescales of tens of thousands of years. The proper elements are related constants of motion that are thought to remain almost constant for times of at least tens of millions of years.

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更新时间:2025/6/18 13:39:34