Lowell Observatory Near-Earth-Object Search (LONEOS) was a project designed to discover asteroids and comets that orbit near the Earth.

The project, funded by NASA, was directed by astronomer Ted Bowell of Lowell Observatory in Flagstaff, Arizona.

LONEOS, in its final configuration, used a 0.6-meter f/1.8 Schmidt telescope, acquired from Ohio Wesleyan University in 1990, and a Lowell-built 16 megapixel CCD detector.

The instrument is located at Lowell Observatory's dark sky site, Anderson Mesa Station, near Flagstaff, Arizona, US.

Human examination was required because most putative NEO detections were not real but some kind of imaging artifact.

However, the telescope was seldom operated in the automatic mode because an observer was required to reduce data promptly and to correct any malfunctions that might have occurred.

The LONEOS frame archive provides a data set with wide spatial and temporal sky coverage.