GRAIL
NASA
Twin craft, Ebb and Flow, that chased each other round the Moon to map its gravity; this is Ebb, flown into a lunar mountain in 2012.
Open in 3DThe flight
September 10, 2011
Launch
December 20, 2011
Arrives at Moon
December 17, 2012
JPL’s track of it ends
From the trajectory NASA JPL Horizons publishes for it.
GRAIL
NASA orbiter mission to the Moon (2011–2012)
The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft, GRAIL A (Ebb) and GRAIL B (Flow), were launched on 10 September 2011 aboard a single launch vehicle: the most-powerful configuration of a Delta II, the 7920H-10.
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Facts
- What it is
- Orbiter
- Agency
- NASA