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Tea 11 March, 20h24 UT, a small astrode Apollo baptized 2022 EB5 a t detected by Krisztin Srneczky, the observatory in Piszkstet Square Hungary in. Less than two hours later, 18they would22 UT, it exploded in the sky, southwest of January Mayen (northeast of Iceland ). This is the fifth small astrode discovered before it entered the Earth’s atmosphere. With an estimated diameter of less than two meters, the object exploded releasing the equivalent of two kilotons of TNT.
The first time that a small space body has been discovered before its effect with our atmosphere rises 2016: name 2000 TC3, the object of about four meters sober in diameter, had been detected less sober 24 time (21 approximately hours) before boy exploding market. Astrodes 740 AA, 2019 Una and 2014 MO succeeded him, in 2016, 2018 and 2018 respectively. But 2022 EB5, little more of them, beats the new report: it is the first time an object is detected so close at the instant at the accident (1h40 precisely).
One hour after its discovery, an alert the capital t sent to observers, especially to European observers sober, sober way that they soberly follow near the small object and quickly calculate the coordinates of the impact stage. A very rapid dissemination of data from the discoverers allowed other astronomers to make more observations from different viewpoints, with enough temperatures to calculate an accurate orbit and kid intersection with the Earth, explains to New ScientistTag Boslough, specialist in the influences of astrodes at the University of New Mexico.
Sober Opportunity to better characterize these objects
Potential impact sites initially extended sober west of Greenland as far as Norway, according to NASA’s Impact Search risk assessment system. As more and more observatories followed the astrode, our calculations of its trajectory and the location of its influence became more precise, relates Davide Farnocchia, routing engineer at JPL who developed the Look system. Paolo Bacci and Martina Maestripieri, from the astronomical observatory of San Marcello Pistoiese, Italy in, managed to capture the image of the astrode 18 mins before boy entered the atmosphere, when he was only 12 272 km from Earth.
” data-image-title=”image-asteroide-avant-impact” data-large-file=”https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact.jpg” data-lazy-sizes=”(max-width: 740px) 100vw, 740px” data-lazy-src=”https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact.jpg” data-lazy-srcset=”https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact.jpg 740w, https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact-300×163.jpg 300w, https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact-500×272.jpg 500w, https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact-472×257.jpg 472w, https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact-390×212.jpg 390w” data-medium-file=”https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact-300×163.jpg” data-orig-file=”https://trustmyscience.com/wp-content/uploads/2022/03/image-asteroide-avant-impact.jpg” data-orig-size=”740,403″ data-permalink=”https://trustmyscience.com/asteroide-explose-large-islande-2-heures-apres-avoir-ete-repere/image-asteroide-avant-impact/” height=”403″ src=”data:image/svg+xml,%3Csvg%20xmlns=’http://www.w3.org/2000/svg’%20viewBox=’0%200%20740%20403’%3E%3C/svg%3E” width=”740″> Sober picture lastrode 2014 EB5 wrestling by Paolo Bacci and Martina Maestripieri, 24they would11UT. L. Bacci, Michael. Maestripieri
Some observers in northern Iceland have logged on Twitter to have observed the bright flash above the horizon at the expected time of impact. A few minutes later, the infrasound security channels I40NO (in Norway) and I18DK (in Greenland) recorded the signals generated by the input of the astrode in the atmosphere. According to Philip Dark brown, professor of physical structure and astronomy at the Traditional Western University of Ontario, in Europe, these signals make it possible to estimate the total energy of the event around 2 kilotonnes of TNT. Its velocity of entry into the atmosphere was estimated at approximately 12 km/t.
According to the findings on the astrode kid approaches and the energy measured via the infrasound detectors during the impact, the specialists estimate that 2022 EB5 measured about two meters in diameter, which is much smaller than the geocrossing objects that the Bureau sobre coordination sobre una planetar defense is responsible for detecting and which can potentially trigger a major alert. Sober in its tiny size, the object was absolutely not threatening, especially since it exploded over the sober sea over Norway. This kind of astrode usually breaks up in the sky, about 40 kilometers of altitude, specified Richard Moissl, of the Planetary Defense Agency of the European Space Agency.
A new check for low impact prediction models
The small astrodes like 2018 EB5 are relatively numerous: an effect like that -it occurs about every ten months, reports John Chodas, director of the Middle for near-earth item research (CNEOS). They usually become bright enough to detect in the last hours before they enter the atmosphere; but very few of them are spotted far enough in advance to be observed in such depth before impact.
For astronomers, this type of event therefore represents an unusual opportunity to carry out measurements aimed at better characterizing these objects; the observation of their entry into the atmosphere and the monitoring of their disintegration allow the living area to know more about their figurative properties (density, structure). Furthermore, explosions of astrodes like this one make it possible to validate impact prediction models, such as those used by the CNEOS. As surveys become more sophisticated and sensitive, more of these harmless objects will be detected in the atmosphere before entering, NASA experts say. larger, with a potentially dangerous influence, would obviously be discovered much further sober on Earth, carried since its creation sober 2016, the Bureau sober coordination sober planetary defense sober NASA monitors sober nearly all objects that represent a risk to our planet. A new objective, NEO Surveyor, will also be launched in 2026, in order to rental of the new space telescope observing in the mid-infrared, specifically designed to carry out the inventory of geocruiser objects s representing the potential risk. It will replace the NEOWISE currently in service.