Effettivamente è stato osservato un bolide, ma la foto e il video sono solo indicativi (una ricostruzione) di ciò che si è potuto vedere.
Di seguito vi riporto la foto e la notizia prelevata sul sito
www.spaceweather.com
<<SUPER-BOLIDE: On Wednesday, July 25th at approximately 10:00 UT, "a major daylight fireball tore across the skies of Slovenia, Croatia and Italy," reports veteran meteor observer Jure Atanackov <mailto> of Maribor, Slovenia. "It produced two bright flashes that reached an estimated magnitude of -20 and also loud sonic booms."
Magnitude -20? In plain language, the meteor was 600 times brighter than a full Moon. Atanackov has gathered reports from hundreds of eyewitnesses. "Most described the fireball as very bright, its surface brightness almost as great as the Sun's. One person said it was 'too bright to look at for more than a few moments.'" >>
Above: This is not the fireball. The image was posted by a Croatian news service <http> as an example of what the fireball looked like. Non-speakers of Croatian misunderstood and widely circulated the photo as a genuine record of the event.
The July 25th fireball falls into the category of superbolides--exploding meteors of magnitude -17 or brighter. They are, essentially, small asteroids measuring a few to 10 meters in diameter and massing a few hundred metric tons. Superbolides trigger seismic detectors on the ground, produce waves of infrasound that can travel thousands of miles, and they are tracked by military satellites scanning Earth for nuclear explosions. Recent examples include the El Paso fireball <http> of 1997 and the Yukon fireball <http> of 2000.
Eyewitnesses, please report your sightings to Jure Atanackov <mailto> or colleague Javor Kac <mailto> who are gathering data to learn more about the "Slovenian Superbolide" and to estimate possible landing sites.