Janus was a planned NASA mission that would have sent dual space probes to visit asteroids chosen prior to launch.

These cameras were developed by Malin Space Science Systems and successfully used on the OSIRIS-REx asteroid sample return mission.

[5] The mission is managed by the Planetary Missions Program Office at NASA's Marshall Space Flight Center in Huntsville, Alabama, as part of the Solar System Exploration Program at NASA Headquarters in Washington, D.C.

Janus is led by the University of Colorado Boulder, where the principal investigator (PI) is based, which will also undertake the scientific analysis for the mission.

After riding along with the launch of NASA's Psyche mission, the Janus twins would have separated and completed an orbit around the Sun, before heading back toward Earth for a gravity assisted sling-shot, each going their separate ways to the two asteroids, (175706) 1996 FG3 and (35107) 1991 VH.