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日心轨道 [rì xīn guǐ dào]
[天] heliocentric orbit
- 若此彗星当年命大、逃过一劫的话，它将在数百年后绕回原先的日心轨道。
Had it not met an untimely death, the comet would have been ejected back into heliocentric orbit within a few hundred years. - 然而，一颗天体要完全脱离日心轨道，并稳定绕著行星运行，就必须先释出部份的初始能量。
But for a body to be permanently captured from heliocentric orbit into a bound, stable orbit around a planet, it must lose some of its initial energy. - 换句话说，在逃走到它在2002 年被捕获的日心的轨道之前，这个物体很可能在这个时期绕地球飞行。
In other words, this object was very likely orbiting the Earth during this period before escaping into the heliocentric orbit from which it was captured in 2002.
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