Orionid meteors

A Dictionary of Astronomy | 1997 | 606 words | Copyright

Orionid meteors A meteor shower showing moderate activity between October2 and November7. 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 6 h 20 m, 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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