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| A bright meteor appeared in the morning of August 13th, 2019. The real time video of the meteor shows the typical green train of a Perseid, which is also visible to the naked eye for the brighter meteors. The Perseids are quite fast with about 60 km/s. This is sufficient to excite atmospheric oxygen at heights of about 100 km and emit green light at a wavelength of 558 nm (Borovicka, 2006). |