2023 CX1, initially known under temporary designation Sar2667, was a metre-sized asteroid or meteoroid that entered Earth's atmosphere on 13 February 2023 02:59 UTC and disintegrated as a meteor over the coast of Normandy, France along the English Channel.

[6] It was discovered less than seven hours before impact, by Hungarian astronomer Krisztián Sárneczky at Konkoly Observatory's Piszkéstető Station in the Mátra Mountains, Hungary.

[1] During a routine search for near-Earth objects with his 0.6-metre (60 cm; 2 ft; 24 in) Schmidt telescope,[10] Krisztián Sárneczky first imaged 2023 CX1 on 12 February 2023 at 20:18:07 UTC, when it was already less than 233,000 km (145,000 mi) from Earth and inside the orbit of the Moon at 0.61 lunar distances.

[2][11] At discovery, the asteroid had an apparent magnitude of 19.4 and moved quickly in the northern hemisphere sky, at an angular rate of 14 arcseconds per minute and a radial velocity of 9 km/s (5.6 mi/s) towards Earth.

[13][15] As the meteoroid travelled eastward over the English Channel to the coast of Normandy, France, it experienced significant atmospheric drag and began burning up as a bright meteor at an altitude of 89 km (55 mi).

[15] Guided by Peter Jenniskens, researchers and citizen scientists of the Fireball Recovery and Interplanetary Observation Network (FRIPON) immediately began a coordinated search effort in the expected meteorite fall area.

[17] On 15 February 2023 15:47 UTC (local time 16:47 CET), FRIPON member and art student Loïs Leblanc found the first meteorite of 2023 CX1 in a field in the commune of Saint-Pierre-le-Viger.

"[17][19] Late in the afternoon of the next day, Peter Jenniskens found a 3 g meteorite near the small-size end of the strewn field that confirmed the predicted center line.