LOS ANGELES (AP) — A NASA spacecraft built to explore two of the solar system's largest asteroids won't launch this year because the space agency is dealing with cost overruns and technical issues in the project.

The planned summer launch of the Dawn spacecraft has been indefinitely postponed, said Andrew Dantzler, director of NASA's solar system division.

Mission managers had been ordered to halt work on Dawn last fall while the project was assessed by an independent review team, which is expected to present its findings to NASA on Jan. 27.