Andromedids

The Andromediden are an active from September 25 to December 6 meteor stream. The radiant of the Andromediden that has a weak maximum around 14 November, is located in the constellation Andromeda (RA 26 °, 37 ° DE ).

The origin comet 3D/Biela why the current is referred to as Bieliden. Biela in the mid -19th century began to unravel. A remarkable meteor shower was on 27 November 1872, when the Earth passed through the comet's closest point to the path observed. Here are several meteors were partially observed simultaneously. The geocentric velocity was 16 km / s ( average meteors have velocities of about 50 km / s, more fast of up to 72 km / s), which the meteors striking moving slowly in the sky.

On November 27, 1885, came again to a meteor shower, in which up to 300 meteors per minute were observed. Since then, no further meteor outburst was observed. Over time, the activity of the Bieliden decreased still further so that the current was barely detectable. In 2011, however, an increased activity was observed in the period from 3 to 5 December 2011, it reached a Zenithal Hourly rate of 50 meteors per hour in the peak. The radiant was located in the constellation Cassiopeia (RA 18 °, 56 ° DE ). These meteors were calculated to be released in the Perihelpassage 1649 by Biela. Two years later in the night 7/8 December 2013 an increasing activity north of the Andromeda galaxy observed.