On Saturday there was a bright fireball over the Caribbean (22.06.2019 – 21:25 UT) South of Puerto Rico.

It is especially interesting considering the different types of instruments that have observed the event. It occurred over the sea so there are no known witnesses (so far). Instead, the fireball was detected with all kinds of sensors: infrasound arrays, a lightning mapper, and even by a ground-based telescope before it entered the Earth’s atmosphere. This is actually only the fourth time an asteroid has been seen before it entered our atmosphere. In recent times we observed 2008 TC3, 2014 AA, and 2018 LA on their way to the atmosphere.
After detection the asteroid was provisional named A10eoM1 and later it received its designation 2019 MO.

The Atlas Project Survey found a small asteroid, which was then recommended for follow-up observations to other observers. This was successfully done with the PanSTARRS system.

First additional information about this event were posted by Peter Brown and Frankie Lucena on Twitter:

Lightning mapper's image of the fireball.

A post by Ernest Guido locates the impact at Latitude: 15.02° N and a Longitude of 68.65° W.

The fireball was detected with at least 3 infrasound stations of the IMS (International Monitoring System) and from this data we derived a source energy of the entering asteroid of around 2.5 kt TNT. This would correspond to a size of about 4.5 m in diameter.

The 4.5 m asteroid from 22. June 2019
The 4.5 m asteroid from 22. June 2019

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