Wednesday , August 17 2022

The Persian Meteor Swarm will be best seen on August 13 with mistletoe


Maximum Persians will also be held this year from August 12th to August 13th, but the observation may be partly overlooked, which will be a few days before full. However, after sunset around 3 in the afternoon, conditions will improve.

Astronomer Legal Tóth, vice-dean of the Faculty of Mathematics, Physics and Computer Science at Comenius University (UK) in Bratislava, told TASR. "So, if someone is keeping these late nights or early morning hours, then the time before braking will be ideal for meteor observation," Toth said.

In fact, peroxides are small particles of dust originating from Comet 109P / Swift-Tuttle, discovered in 1862. Cloud Oort, which is located at the boundary of the Solar System. With a size of ten kilometers, it is a giant in its category and its orbital time is 133 years. She last found herself near the Sun or Earth, in 1992, and is expected to return again in 2126. Comet particles, mostly less than grains of sand, are found throughout its entire elliptical orbit.

When the Earth finds its orbits in the region where it passes through the comet orbit, the particles fly into their atmosphere at a relatively high speed of 59 kilometers per second. By doing this, they heat up to a temperature of over 1600 degrees and burn rapidly at 80 to 120 kilometers above the ground.

It is this light phenomenon called a meteor, while the element that causes it is a meteoroid in scientific terminology. If the particle does not burn in the atmosphere but hits the ground, it is a meteorite. And extremely bright and radiant meteors often leaving a trace of smoke are called bulbs.

The rate of meteor rain then depends on where the Earth intersects the area where the comet particles are located. That is, how dense is the particle stream at a given location.

"Persesids have a constant rate of spread ranging from 100 to 120 meteors per hour in ideal conditions, which in fact means that a normal observer can see them around 50 to 60. However, there are years when the frequency of meteors can be doubled, around 200 per hour and for a normal observer about 100. This extraordinary frequency of Persians was last seen in 2016. However, this year's extraordinary performance is not expected, "Tóth explained.

The items are monitored by cameras that continuously capture the night sky. According to Toth, meteorite orbits tell us what was the orbit of the comet Swift-Tuttle when it produced these particles – the last time it passed through perihelion, the region closest to the Sun.

The action of meteor swarm is captured, for example, by cameras from the AMOS observation system, created at the UK Astronomical and Geophysical Observatory (AGO) near Modra. "Our system is special because it has cameras all over the world. Five cameras are located in Slovakia, two are in the Canary Islands, two in the Chilean Atacama Desert and two in the Hawaiian Islands.

We will put three cameras in Australia and another three in Namibia, which will cover the entire world, including the southern and northern skies, "AGO Modra's Dušan Kalmančok told TASR. Tóth and Kalmančok are among the authors of the AMOS system. visual observation is also of scientific importance, as meteors are tracked by experienced observers across the planet and compared with observations from year to year.

The meteor shower was called Persian because the radiance from which the meteors seem to fly is in the area of ​​the constellation Perseus, which rises late at night over the northeastern horizon. They are also called Tears of St. Lawrence after the Holy One, which burned on 10 August 258 in Rome.

Scientists say brighter meteors will be visible despite moonlight. Light pollution is also a deciding factor – it is better to observe meteors outside areas using public lighting. According to the forecast of the Slovak Hydrometeorological Institute, the weather should be low, e.g. favorable. In addition, extremely clear bolides are present among the Persians.

Unlike other meteor currents, which have a very short-lived maximum, the region of bodies originating from the Comet 109P / Swift-Tuttle flies over the Earth for quite some time. That is why Persian activity has been observed for a longer period – from the end of July to the end of August. And even on clear weekend nights, it's a great chance to watch the "falling stars".

Source: TASR

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