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? $\endgroup$
    – user24157
    Commented Sep 18, 2020 at 13:35
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    $\begingroup$ I'm also curious about "precovery" detections. How many of each have there been? $\endgroup$
    – usernumber
    Commented Sep 18, 2020 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
    Commented Sep 18, 2020 at 17:20
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    $\begingroup$ @Giovanni Please work that into an answer. Don't answer questions in comments. $\endgroup$
    – James K
    Commented Sep 18, 2020 at 19:13
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    $\begingroup$ @JamesK My comment is an example. It doesn't answer all the OPs questions $\endgroup$
    – Giovanni
    Commented Sep 19, 2020 at 6:12


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