“Orionid meteors”的概念、定义、翻译、参考文献-科学参考

Orionid meteors

Astronomy

A meteor shower showing moderate activity between October 4 and November 7. The activity pattern is complex, with several peaks and troughs, presumably reflecting the filamentary nature of the meteor stream laid down over several perihelion returns by Halley’s Comet. A broad maximum, with ZHR reaching 30, is seen for a couple of days around October 21, from a radiant at RA 6h 20m, dec. +16° (between Betelgeuse and Gamma Geminorum). Orionid meteors are very swift (geocentric velocity 66 km/s), and a high proportion leave persistent trains, but most are faint.

单词	Orionid meteors
释义	Orionid meteors Astronomy A meteor shower showing moderate activity between October 4 and November 7. The activity pattern is complex, with several peaks and troughs, presumably reflecting the filamentary nature of the meteor stream laid down over several perihelion returns by Halley’s Comet. A broad maximum, with ZHR reaching 30, is seen for a couple of days around October 21, from a radiant at RA 6h 20m, dec. +16° (between Betelgeuse and Gamma Geminorum). Orionid meteors are very swift (geocentric velocity 66 km/s), and a high proportion leave persistent trains, but most are faint.
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