2022 WJ1, formerly designated C8FF042, was a small, harmless ≈1-metre near-Earth asteroid or meteoroid that impacted Earth's atmosphere on 19 November 2022 at 08:27 UT in Southern Ontario, Canada, above the Golden Horseshoe region, southwest of Toronto.

The final observation was from Mauna Kea, 32 minutes before impact, just before it entered Earth's shadow.

[17] The Minor Planet Center noted that Earth's atmosphere was impacted above Brantford 70 km from Grimsby.

[2] The resulting sonic boom was mostly heard in Hamilton while the fireball was visible to observers in the Greater Toronto Area and as far as the U.S. states of Maryland, Ohio, Pennsylvania, and New York.

[5] Even at opposition on 15 October 2022 when 2022 WJ1 was 0.2 AU (30 million km; 78 LD) from Earth, it had an unobservable apparent magnitude of 31 which is about 600 times too faint to be detected by even the most sensitive automated allsky surveys.