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Started by Rick, Feb 12, 2023, 23:38:20
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QuotePeter Birtwhistle has reported that NEOCP object Sar2667 is showing a probable impact over northern France tomorrow morning. It is tiny, only around 1m, so it will burn up in the atmosphere but it could be a spectacular fireball.The latest impact prediction is: 2023 Feb 13 02:59 UTC at lat +49.81751, lon E 0.43452The current astrometry covers a short arc but is of good quality.https://cgi.minorplanetcenter.net/cgi-bin/showobsorbs.cgi?Obj=Sar2667&obs=y
QuoteThe discoveries have all been from the northern hemisphere (actually only three observatories, two in the US and one in Hungary) but one of the impacts was in the southern hemisphere. Most of the Earth's surface is water so it is quite unlikely for an impact to be over land. The rate of discovery of these small objects pre-impact has increased over the last few years. The CNEOS data shows that there is no northern hemisphere bias. It is just that there are more observers there.Of the seven pre-discovered impactors so far:2008 TC3 was discovered by CSS at Mt. Lemmon and landed in Sudan with recovery of a lot of material.2014 AA was discovered by CSS at Mt. Lemmon probably landed in the Atlantic between Africa and Central America.2018 LA was discovered CSS at Mt. Lemmon and landed in Botswana.2019 MO was discovered by ATLAS at Mauna Loa and landed in the Carribbean.2022 EB5 was discovered by Konkoly Observatory, Hungary and landed somewhere between Greenland and Iceland.2022 WJ1 was discovered by CSS, Mt. Lemmon and landed in Lake Ontario. I don't think any fragments were found but Denis will know about that one!2023 CX1 was another Konkoly discovery and landed on the north coast of France. A search for falls is underway.Many of the larger impactors appear in the declassified CNEOS data but 2014 AA is missing. The two recent ones (2023 CX1 and 2022 WJ1) were very small, probably a metre or less given how faint they were before they hit the atmosphere.