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Of these, fifteen were "one nighters. An impact solution, also known as a "virtual impactor" VIis not a prediction but rather a possibility derived astrodomi a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years.
Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. MPEC S03 time-stamped " MPEC S26 - " MPEC S25 - " The discovery was confirmed by MLS Sept. MPEC S24 - " Astrodomi S23 - "