February 24, 2024


Meteorite Strewn Field Maps, News, and Reports

Zaręby Kościelne, Poland

1 min read

Zaręby Kościelne, Poland – Thursday, April 27, 2023, 3:40 AM local time, A meteor fireball was observed by the Polish Fireball Network, heading southeast at 14 km/s, and ending at a height of 28 km. This was a typical size fireball moving at a relatively slow speed and it is likely some meteorites reached the ground. Also, the search area is fairly small, so chances of recovery are good.

Rating:Class B
Entry Date/Time:2023-04-27 01:40:50 UTC
End Location:90 km NE of Warsaw, Poland
Endpoint Coordinates:52.7582°N, 22.0293°E
Reference Altitude:28.06 km above sea level
Energy / Mass Estimate:<3 tonne TNT / <100 kg?
Reference Speed:14.3 km/s
Bearing:126.9° SE
Slope:24.8° from vertical
Estimated Strewn Mass:< 14 kg
Estimated Main Mass:< 3.9 kg
Modelled Strewn Density:0.49 kg/km^2
Event Links:none

News and Video

The fireball was captured by 4 cameras in the Polish Fireball Network. One of the best videos is this one, showing fragmentation at the end.

Polish Fireball Network – PFN52

Search Efforts

Search efforts are in progress, stay tuned here for updates.

Google Street View of the strewn field area. Looks decent for searching!

No meteorites have yet been found.

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StrewnLAB Maps & Data

Trajectory data for this event was provided by Zbigniew Tymiński of the Polish Fireball Netork (PFN) on May 5th, 2023. The trajectory solution was run through the StrewnLAB software to predict the search area shown below. Only two cameras were used in the initial solution, but results were very precise. Please download and review the Google Earth files below for detailed maps of the search area.

Update 2023-05-08 12:56 UTC | Version 2 released | Only 2 of the 4 cameras were used in data analysis, additional error analysis resulted in increased measurement error. Simulation was re-run and the search area was expanded a bit. The Polish Fireball Network (PFN) is also reviewing their data, per my request, to investigate the possibility of including additional cameras in the solution.

Update 2023-05-09 02:32 UTC | Version 3 released | New trajectory solution provided by PFN, using all 4 cameras that observed the event. It is assumed that this new trajectory is more accurate overall, but the uncertainty is a little higher. For this reason, the version 3 search area is larger.

Zaręby Kościelne StrewnLAB V3
Critical Search Area V3

Weather Data

The weather data below is sourced from weather balloons, and publicly available via NOAA’s Integrated Global Radiosonde Archive (IGRA). This data is downloaded and post-processed by the StrewnLAB algorithm, to account for changing weather patterns and weather balloon drift. The plots have altitude on the y-axis, in kilometers above sea level. The wind speed below 10km has large effect onthe drift of meteorites.

Light winds from the west caused minimal drift

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