On 28 February 2020 around 09:35 UTC (10:35 CET) people from Italy, Slovenia, and Croatia were witnesses to a spectacular daytime fireball. The fireball was only visible for a few seconds, with an extremely bright glow at the end of its trajectory.

AMS/IMO has already received 70 witness reports so far.
If you witnessed one of these event and/or if you have a video or a photo of this event, please

Submit an Official Fireball Report
(available in 36 languages)


The trajectory which was computed based on the IMO reports indicates that the event happened above Slovenia:

The IMO reports with computed trajectory for the fireball from 28. February 2020

The entering object was detected with US government sensors. They published a time of the fireball of 09:30:34 UT, coordinates of Lat: 45.7° N, Lon: 15.1° E, a velocity of 21.5 km/s, and an energy of 0.34 kt TNT of the entering object.

The event could also be measured by infrasound stations. In the waveforms of two stations of the International Monitoring System of the Comprehensive Nuclear-Test-Ban Treaty Organisation a signature of the fireball could be identified.
We were able to calculate a source energy of the entering asteroid of about 5 kt TNT. With the velocity published from CNEOS and an assumed density of 3000 kg/m3 the size would be around 4 m diameter, with a mass of about 90 t!

Size comparison of the fireball from 28. February 2020
Size comparison of the fireball from 28. February 2020

There were reports of a sonic boom and various nice images and videos of the fireball on Social Media e.g. Twitter. In a post by Strewnify even a strewn field computed by Jim Goodall was shared.


A first meteorite was recovered in Prečna near Novo Mesto! Following this article from total slovenia news the meteorite’s authenticity was confirmed on Saturday evening. The fragment has a weight of 203 g and was classified as a chondrite.

Meteorite Novo Mesto
Meteorite Novo Mesto – bojanambrozic.com

Further meteorites are expected to be out there – so go find them!
In the course of the PRISMA project the strewn field was computed and published. Albino Carbognani was able to calculate the atmospheric trajectory and strewn field based on CNEOS data.

 Trajectory and strewn field of the daylight fireball of 28 February 2020: Image Credit: Project PRISMA/A. Carbognani
Trajectory and strewn field of the fireball of 28 February 2020: Image Credit: Project PRISMA/A. Carbognani


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