The first of Wednesday’s cosmic flybys and the largest, measuring 157.5ft to 360.8ft (48 to 110 meters) across, will be asteroid 2019 UK6, which will speed past at approximately 6.20am GMT (1.20am EDT). It is 2019 UK6 we had most prior warning about, as it was first observed on October 24.
NEO 2019 UK6 is an Amor asteroid, which that goes around the Sun and the Earth, occasionally, but very rarely, crossing Earth’s path. Apollo asteroids, on the other hand, intersect with Earth’s orbit as the planet travels around the Sun.
Last up will be 2019 WE, also spotted at the last second on November 17. This asteroid will sail past our planet at a distance of about 1.3 million kilometers away.The second of the Wednesday’s flybys will be 2019 WF, first spotted by NASA’s asteroid hunters just two days ago on November 17. Estimated to be about 24 meters wide, it will make its closest Earth approach at roughly twice the distance to the moon, so no danger of an extinction level event there anyway.
According to NASA’s Center for Near-Earth Object Studies (CNEOS), all three will have what are dubbed “near-Earth approaches,” but thankfully none are believed to pose any threat.