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Vanguard 3 - 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
2021 Dec 06 07:23:564.9498.696COSMOS 2251 DEB34861small
2021 Dec 07 00:09:533.44012.769FENGYUN 1C DEB37081small
2021 Dec 08 09:14:213.57212.720DMSP 5D-2 F6 DEB40914small