Pick up to 4 missions to compare side-by-side. State lives in the URL — share the link and the comparison loads exactly as you left it.
Six nations have placed lunar orbiters since 2007 — a 4× increase in 15 years.
| Attribute | 🇺🇸 Clementine (DSPSE) Deep Space Program Science Experiment Trust: Agency-primaryⓘ Last verified Remove × | 🇯🇵 SELENE (Kaguya) SELenological and ENgineering Explorer Trust: Agency-primaryⓘ Last verified Remove × | |
|---|---|---|---|
| Agency | USAF/NASA (BMDO) | NASA | JAXA |
| Status | Mission Complete | Mission Complete | Mission Complete |
| Mission type | Orbiter | Impactor | Orbiter |
| Launch date | 1994-01-25 | 2009-06-18 | 2007-09-14 |
| End date | 1994-07-20 | 2009-10-09 | 2009-06-10 |
| Orbit | Polar elliptical orbit 425 × 2,942 km | Elliptical shepherding orbit; impacted Cabeus crater | 100 km circular polar orbit (primary phase) |
| Mass | 424 kgas of [1] | 891 kgas of [1]LCROSS + Centaur upper stage (2,366 kg total impact); Centaur impacted first | 2,855 kgas of [1]Main orbiter (2,230 kg) + Rstar relay sub-satellite (53 kg) + VRAD sub-satellite (52 kg) ↑ Heaviest |
| Instruments | 6 cameras + laser ranger + charged particle telescopeas of [1] | 9 instrumentsas of [1] | 15 instrumentsas of [1] ↑ Most instruments |
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| Outcome | A USAF/NASA joint mission using miniaturized military sensor technology. Clementine produced the first global multispectral map of the Moon and provided the first indirect evidence for polar water-ice via bistatic radar. A computer malfunction during the planned asteroid flyby phase left it in an unusable orbit. | NASA's low-cost ($79M) impactor mission co-launched with LRO. The Centaur upper stage struck Cabeus crater on October 9, 2009, ejecting a plume of material that LCROSS analyzed as it flew through it before also impacting. This definitively confirmed water-ice in permanently shadowed craters — one of the most important planetary science results of the 2000s. | JAXA's flagship lunar orbiter, second only to LRO in scientific output. SELENE performed a controlled impact on the lunar near-side in June 2009, with the impact flash confirmed by ground telescopes. Its terrain camera produced the most complete global DEM of the Moon prior to LOLA/LRO. |
All 11 lunar orbital missions with primary-source citations from NASA, ESA, JAXA, ISRO, CNSA, and NASA NSSDCA. Coverage spans Clementine (1994) through LRO (active 2026). Pure URL state — bookmark or share the link and the comparison reproduces exactly.