These are other NASA missions (ongoing and future) for which the IRTF has a
less obvious role.| Mission | Mission Type | Launch | Targets | |
 | Voyager | Large NASA | Aug 1977 | Heliopause |
 | Ulysses | Extended | Oct 1990 | Heliosphere |
 | Clementine | SDIO/NASA | Jan 1994 | Lunar Surface |
 | Mars Global Surveyor | Mission series | Nov 1996 | Mars Surface, interior |
 | Mars Pathfinder | Discovery | Dec 1996 | Mars |
 | Lunar Prospector | Discovery | Jan 1998 | Lunar surface |
 | Keck Interferometer | Observatory | Jul 1998 | Extra-Solar Planets |
 | Leonid MAC | Short Term | Nov 1998 | Meteor Stream |
 | Deep Space 2 | New Millennium | Jan 1999 | Mars surface |
 | Deep Space 3 | New Millennium | late 2001 | Bright astrophysical objects |
 | Solar Probe | Outer Planets Pgm | Nov 2003 | Sun |
 | Space Interferometry Mission | Future Observatory | ---- | Origins |
 | Terrestrial Planet Finder | Future Observatory | ---- | Origins |
 | Genesis | Discovery | Phase B | Solar Wind |