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Vanguard 1 - Close encounters

The following table lists the upcoming close encounters with all other known orbiting objects for which orbital elements are available (over 16000). Only objects which come within 5 km are included. Please note that the accuracy of these predictions is limited by the accuracy of the latest orbital elements. A position accuracy of approximately 1 km is typical. Click on a row to get more details about the encounter and a graphical representation.

Time (UTC) Distance Relative speed Other object
km km/s Name ID Radar cross section
2025 Nov 17 14:55:393.89210.674COSMOS 2251 DEB33762small
2025 Nov 18 15:10:492.5517.949COSMOS 2251 DEB37961small
 

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