Andromedids
Encyclopedia
The Andromedids meteor shower
Meteor shower
A meteor shower is a celestial event in which a number of meteors are observed to radiate from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories. Most meteors are smaller...

 is associated with the comet
Comet
A comet is an icy small Solar System body that, when close enough to the Sun, displays a visible coma and sometimes also a tail. These phenomena are both due to the effects of solar radiation and the solar wind upon the nucleus of the comet...

 3D/Biela
3D/Biela
Biela's Comet or Comet Biela was a periodic comet first recorded in 1772 by Montaigne and Messier and finally identified as periodic in 1826 by Wilhelm von Biela. It was subsequently observed to split in two and has not been seen since 1852...

, the showers occurring as the earth's orbit passes through the tail of the comet. The comet largely broke up between 1843 and 1852 leading to particularly spectacular showers in subsequent cycles (1872, 1885).

Historical Appearances

The first known sighting of the Andromedids was December 6, 1741 over St Petersburg, Russia. Further strong showers were witnessed in 1798, 1825, 1830, 1838 and 1847. The Andromedids produced spectacular displays of several thousand meteor
METEOR
METEOR is a metric for the evaluation of machine translation output. The metric is based on the harmonic mean of unigram precision and recall, with recall weighted higher than precision...

s per hour in 1872 and 1885, as a result of Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

's orbit crossing the parent comet's orbital debris. In Burma the 1885 shower was perceived as a fateful omen as augering and was indeed followed swiftly by the collapse of the Konbaung Dynasty
Konbaung dynasty
The Konbaung Dynasty was the last dynasty that ruled Burma from 1752 to 1885. The dynasty created the second largest empire in Burmese history, and continued the administrative reforms begun by the Toungoo dynasty, laying the foundations of modern state of Burma...

and the conquest by Britain.

Current Activity

Since the 19th century the Andromedids have faded so substantially that they are no longer generally visible to the naked eye, though some activity is still observable each year in mid-November given suitable detection equipment. Peak activity is currently less than three meteors per hour around November 14.

External links

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