In the early hours of February 28, a NASA satellite narrowly avoided a potential collision high above Earth.

Agency officials reported that at 1:34 a.m. EST (0634 GMT), the inactive Russian spy satellite Cosmos 2221 came uncomfortably close to a NASA spacecraft known as TIMED, which has been dedicated to studying Earth’s atmosphere since 2001.

“While the two non-maneuverable satellites will approach each other again, this was their closest pass in the current predicted orbit determinations, as they are gradually moving apart in altitude,” NASA officials wrote in an update today, Space.com reported.

The recent update did not provide details on the proximity of the encounter, but satellite-monitoring company LeoLabs has supplied the figures, and they are concerning.

Orbiting at an altitude of approximately 378 miles (608 kilometers), the two spacecraft had a close call, missing each other by a distance of less than 65 feet (20 meters).

Such close encounters are becoming more frequent as Earth’s orbit becomes progressively congested.

Written by B.C. Begley