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The Jeddah Astronomical Society said the first quadrangles of the first major meteor showers are expected to be in 2021, the peak of its fall in the Arab world skies from mid-tomorrow, Sunday, after the climax. of its radiation after midnight and during the hours preceding sunrise on Monday in the phenomenon of visualization with the naked eye without the need to use devices. .
The association added, that the quadrilaterals produce around 120 meteors per hour, however, this maximum rate is calculated assuming the sky is completely dark and its radiating point is at the top of the sky so in practice any real observation may not not meet the ideal conditions, and therefore the number of meteors It is likely that this will be much less, especially since the moon will be in the final square phase, coinciding with the height of the tetrapods, which will cause the blur of most faint meteors..
The Jeddah Astronomical Society explains that in general, it is possible to see up to 45 meteors an hour after midnight or less from a dark location away from city lights, and they are expected to be in their best conditions shortly before dawn, when their radiating point is at their highest altitude. in the sky.
She pointed out that the point of radiation or launch of the quadrilateral meteors is located near the constellation Ursa Major and the bright star ichthyosis spears at the northern end of the constellation Howl on the northern horizon, but l the observer does not need to determine the point of radiation of meteors because they appear from anywhere in the sky.
And she continued: Annual meteor showers occur as the globe passes in its orbit around the sun through dense gatherings of dust and gravel scattered along the orbits of comets and asteroids, where they collide with the top of the earth’s atmosphere and burn at an altitude of between 70 and 100 km and appear to us as a band of light and this leads to the appearance of meteor showers which repeat annually.
She said that meteors associated with particular showers radiate from a common point in the sky, so the showers can be easily distinguished from others because their paths appear to radiate or emit from a common point in the sky. the sky, because the pebble particles in a given gathering move in roughly the same direction as they pass through an orbit. Earth, because it has very similar orbits to the original object it came from and hits Earth in roughly the same direction and at the same speed.
She pointed out that the source of the quaternary meteors is a mystery and that in 2003 it was determined that their main source was the asteroid in 2003. EH1And if so, then the quadrilaterals, like meteors, are from a rocky body – not an icy comet, which would be 2003. EH1 Himself is the culprit C / 1490 Y1 , Which was spotted 500 years ago, so the exact story behind the source of the Quadrangles remains somewhat vague.
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