Orionids

The Orionids are one of the five most active meteor streams. They make up every year in the whole of October noticeable as a swarm of meteors, most in the early hours of days from 19 to 23 October. A noticeable number is observed about 12 to 29 of October.

The small body is only a few milligrams hard, but produce because of their high speed but a bright tracer by ionization of air particles in the high atmosphere. In contrast to sporadic ( randomly distributed ) meteors because they have the common origin of comets almost parallel paths in space.

This makes them seem out of their vanishing point to get the so-called radians, which is in the constellation of Orion, near the top, about 10 ° north of the red giant star Betelgeuse in the sky. Average one can freiäugig outside the big cities per hour to see about ten of these tracks that have been investigated in detail with radar methods.

The Orionids are loose clouds scattered material of Halley's comet, which have spread by influences of small perturbations and the solar wind all along the comets path over the millennia. The Eta- Aquariiden the first half of May come from Halley 's Comet, but from another point of its sleek elliptical orbit.