NASA's Planetary Defense Coordination Office is tracking a 2046 Valentine's Day meteor.
Orbit experts will monitor 2023 DW despite NASA's "very small chance" of impact.
"To reduce uncertainty and accurately predict their orbits years later, we need a few weeks of data on new objects."
NASA and ESA projected that 2023 DW would hit Earth on February 14, 2046.
The good news is there’s only one chance in 500 or so that will actually hit the Earth
"The bad news is, we are seated prey, defenseless," said theoretical physicist and scholar Michio Kaku, Ph.D.Our brand-name rock is unbreakable.
Kaku said 2023 DW is a "city buster" that could destroy Washington, D.C., or London if it hit Earth.
The asteroid is the only one on the Torino Scale that will pass Earth without a danger, according to Forbes.
NASA's Center for Near Earth Object Studies' Torino Scale classifies asteroid impact risks by chance and impacts.