2023 Bright Perseid Meteor and a Persistent Train

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A time lapse sequence captured during Perseids meteor shower 2023 from Dark Sky® Alqueva, in Portugal, shows a fast bright meteor traveling at a speed of about 60 kilometers per second, disintegrating while passing through the thin atmosphere at high altitude. Meteors can excite green emission from oxygen atoms releasing the color we see, originated from ionized chemical elements. Blue-green is typically originated from magnesium, nickel also glows in green color, while calcium is radiating violet. Immediately after explodes, this Perseid meteor was lingering a visible orange trail, known as a persistent train, which persists visible for a few minutes. According to Nasa, “the glow emanated from atoms in the Earth’s atmosphere in the path of the meteor – atoms that had an electron knocked away and emit light during reacquisition.” The time lapse shows the initial wind-blown displacement of these bright former ions, while the “orange smoke” dissipates and drifts away in the Earth atmosphere.

Uma sequência time lapse captada durante a chuva de meteoros Perseidas 2023 a partir do Dark Sky® Alqueva, em Portugal, mostra um meteoro rápido e brilhante, viajando a uma velocidade de cerca de 60 quilómetros por segundo, desintegrando-se ao passar pela fina atmosfera em alta altitude. Os meteoros podem excitar os átomos de oxigénio liberando a cor verde que vemos, originada de elementos químicos ionizados. O azul-esverdeado é tipicamente originado do magnésio, o níquel também brilha na cor verde, enquanto o cálcio irradia na cor violeta. Imediatamente após explodir, este meteoro proveniente das Perseidas deixou uma trilha laranja visível, conhecida como “persistent train”, que persiste visível por alguns minutos. Segundo a Nasa, “o brilho emana de átomos na atmosfera da Terra que se encontram no caminho do meteoro – átomos que tiveram um electrão arrancado e emitem assim luz durante a reaquisição”. O lapso de tempo mostra o deslocamento inicial desses iões brilhantes, pelo vento, enquanto a “fumaça laranja” se dissipa e se afasta na atmosfera da Terra.


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