Don’t take a break or you’ll miss it.

A once-in-a-generation asteroid wider than Manhattan will fly by Earth – and there’s a chance you could see it with your own eyes.

Space rock 877 Alinda, one of the five largest expected to fly safely but close to our planet this century, flew by about 7.6 million miles away on Wednesday. It will stay like this for another week or so.

However, according to Forbes, Sunday is the optimal day to see the two-and-a-half-mile-wide near-Earth asteroid discovered in 1918.

Still, you’ll need some help from a pair of “modest” binoculars, as Sunday’s predicted magnitude of 9.4 isn’t bright enough for the naked eye, wrote Virtual Telescope Project astronomer Gianluca Masi.

Over the next nine days, amateur stargazers will also be able to catch a glimpse of Alinda with binoculars.

The best type for stargazing is a 10×50 optic, he noted.

According to In The Sky, the best time to look on Sunday for New York is after 6 p.m. and about 22 degrees above the eastern horizon and toward the constellation Gemini.

Understandably, there is a solution for that too if you prefer to stay indoors during the cold snap.

The Virtual Telescope Project will host a livestream of Alinda on Sunday starting at 12:30 EST.

In 2087, Alinda will be comparatively close to Earth again.

However, if you miss the chance to see the asteroid this time, it won’t be all that earth-shattering.

“A similar event happens on average once a decade,” Masi added.