The European Space Agency and SpaceX are hoping for good enough weather as they prepare to launch a mission to a binary asteroid Monday morning.

The Hera mission is a follow-on operation, which will examine Didymos and it moon, Dimorphos, after the latter was struck by NASA’s Double Asteroid Redirection Test (DART) spacecraft.

“It’s been 18 years we’ve been working to put this mission together, so you can imagine our emotions, not only mine, but the whole team,” said Ian Carnelli, the Hera project manager, during a prelaunch media briefing.

Liftoff of the Falcon 9 rocket from pad 40 at Cape Canaveral Space Force Station is set for 10:52 a.m. EDT (1452 UTC). Spaceflight Now will have live coverage of the mission beginning about 1.5 hours ahead of liftoff.