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Once a meteoroid starts burning up in the atmosphere, it becomes a visible meteor. Have any meteoroids been detected before they started to burn in the atmosphere? If yes, what is the ballpark estimate for the number of meteoroids detected before they reach Earth's atmosphere?

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    $\begingroup$ For the purposes of this question, are you also counting detections that are found in archived data after the meteor is observed, i.e. "precovery" observations, or only discoveries that allow predictions of future meteors? $\endgroup$ – antispinwards Sep 18 at 13:35
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    $\begingroup$ I'm also curious about "precovery" detections. How many of each have there been? $\endgroup$ – usernumber Sep 18 at 14:27
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    $\begingroup$ In 2008 a meteoroid was discovered that was successfully predicted to enter the atmosphere. en.wikipedia.org/wiki/2008_TC3 $\endgroup$ – Giovanni Sep 18 at 17:20
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    $\begingroup$ @Giovanni Please work that into an answer. Don't answer questions in comments. $\endgroup$ – James K Sep 18 at 19:13
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    $\begingroup$ @JamesK My comment is an example. It doesn't answer all the OPs questions $\endgroup$ – Giovanni Sep 19 at 6:12

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