Meteor Shower

Meteor shower is the process of the appearance of meteors at the moment of contact of the Earth with a large part of the meteor swarm, while an intense manifestation of the meteor shower is observed. The meteor shower period is characterized by a large number of meteorites that are recorded within one hour. Their number can reach several thousand. Thus, the Draconis meteor shower in 1833 and 1946 caused meteor showers with an intensity of 12,000 and 30,000 meteorological units in one hour.
patrol
According to Wikipedia, a meteor patrol is a device that is designed to detect and register meteors. A photograph or video camera with a wide-angle lens aimed at the zenith is the main part of the meteor patrol. It must be equipped with a device that periodically closes the lens – an obturator, which most often is a propeller with flat blades rotating around its axis. As a result of the work of the meteor patrol, it is possible to obtain long-term exposures of the night sky. At the same time, in images and photo effects, stars are obtained in the form of arcs due to the daily (see Day) rotation of the Earth. If a meteor appears in the camera’s field of view during the exposure, its image can be represented as a straight, interrupted line, since the rays of the obturator pass in front of the lens. The range of the segments of this line, depending on the speed of rotation of the obturator, allows you to calculate the speed of the meteor.
flow
A natural meteorological stream is a collection of a large number of meteors with a common radiant (more information about this can be found here). It can be observed when a meteorite swarm comes into contact with the Earth. The conventional names of meteor showers are formed from the Latin or Russian name of the constellation in which the radiant is located. The intensity of meteorological observations is characterized by their hourly number – the number of meteors that are observed during an hour. There are a huge number of meteor showers that manifest themselves at all times of the year, but only a few of them have maximum power, reaching up to several dozen. There are four quadrantids: January 3, Lyrids (April 21), Aquarids (May 5), Perseids (August 12), Orionids (October 21), Leonids (November 17), Gemenids (December 12) and Ursids (December 22).
It is worth noting that there are meteor showers with radiants that are in the daytime sky at the time of their peak activity. Since meteors related to them can only be observed during the morning or evening twilight and recorded using radars, their visual observation is possible only during this period. Streams with radiants in the constellation of Aries (June 7) and Perseus (June 13), having hourly values at a maximum of 60 and 40, can be attributed to meteor showers.
radiant
A point located on a celestial sphere, from which, according to the observer, meteors of the same meteor shower seem to fly out (see here). In fact, meteoroids make a complete revolution around the Earth and fall on all hemispheres along parallel trajectories. We owe this to the similarity of their visible tracks to a single point, a perspective effect familiar to everyone who has watched the railway tracks converge and diverge towards the horizon.